diff --git a/src/components/Chart.tsx b/src/components/Chart.tsx
index ae91329e..de01081d 100644
--- a/src/components/Chart.tsx
+++ b/src/components/Chart.tsx
@@ -25,7 +25,7 @@ import {
   materializeStyles,
   getSeriesStatus,
   getDatumStatus,
-  sortDatums,
+  sortDatumsBySecondaryPx,
 } from '../utils/Utils'
 import buildAxisLinear from '../utils/buildAxis.linear'
 import { ChartContextProvider } from '../utils/chartContext'
@@ -70,7 +70,7 @@ function defaultChartOptions<TDatum>(
     getSeriesOrder:
       options.getSeriesOrder ?? ((series: Series<TDatum>[]) => series),
     interactionMode: options.interactionMode ?? 'primary',
-    showVoronoi: options.showVoronoi ?? false,
+    showVoronoi: options.showVoronoi ?? true,
     defaultColors: options.defaultColors ?? defaultColorScheme,
     useIntersectionObserver: options.useIntersectionObserver ?? true,
     intersectionObserverRootMargin:
@@ -269,7 +269,10 @@ function ChartInner<TDatum>({
           optionsWithScaleType.stacked = true
         }
 
-        return { position: !i ? 'left' : 'right', ...optionsWithScaleType }
+        return {
+          position: !i ? 'left' : 'right',
+          ...optionsWithScaleType,
+        }
       }
     )
   }, [options.data, options.secondaryAxes, primaryAxisOptions])
@@ -491,11 +494,17 @@ function ChartInner<TDatum>({
     })
 
     datumsByInteractionGroup.forEach((value, key) => {
-      datumsByInteractionGroup.set(key, sortDatums(value, secondaryAxes))
+      datumsByInteractionGroup.set(
+        key,
+        sortDatumsBySecondaryPx(value, secondaryAxes)
+      )
     })
 
     datumsByTooltipGroup.forEach((value, key) => {
-      datumsByTooltipGroup.set(key, sortDatums(value, secondaryAxes))
+      datumsByTooltipGroup.set(
+        key,
+        sortDatumsBySecondaryPx(value, secondaryAxes)
+      )
     })
 
     allDatums.forEach(datum => {
@@ -506,7 +515,12 @@ function ChartInner<TDatum>({
     })
 
     return [datumsByInteractionGroup, datumsByTooltipGroup]
-  }, [allDatums, options.interactionMode, tooltipOptions.groupingMode])
+  }, [
+    allDatums,
+    options.interactionMode,
+    secondaryAxes,
+    tooltipOptions.groupingMode,
+  ])
 
   const getSeriesStatusStyle = React.useCallback(
     (series: Series<TDatum>, focusedDatum: Datum<TDatum> | null) => {
diff --git a/src/components/Tooltip.tsx b/src/components/Tooltip.tsx
index 3e617247..887bfcac 100644
--- a/src/components/Tooltip.tsx
+++ b/src/components/Tooltip.tsx
@@ -187,6 +187,7 @@ export default function Tooltip<TDatum>(): React.ReactPortal | null {
               getOptions,
               focusedDatum: latestFocusedDatum,
               primaryAxis,
+              secondaryAxes,
               secondaryAxis,
               getDatumStyle: (datum: Datum<TDatum>) =>
                 getDatumStatusStyle(datum, focusedDatum),
diff --git a/src/components/TooltipRenderer.tsx b/src/components/TooltipRenderer.tsx
index 3eb15247..cbc6e9e0 100644
--- a/src/components/TooltipRenderer.tsx
+++ b/src/components/TooltipRenderer.tsx
@@ -25,6 +25,7 @@ export type TooltipRendererProps<TDatum> = {
   focusedDatum: Datum<TDatum> | null
   getOptions: () => ResolvedChartOptions<TDatum>
   primaryAxis: Axis<TDatum>
+  secondaryAxes: Axis<TDatum>[]
   secondaryAxis: Axis<TDatum>
   getDatumStyle: (datum: Datum<TDatum>) => CSSProperties
   anchor: ReturnType<typeof useAnchor>
@@ -325,47 +326,58 @@ function TooltipRenderer<TDatum>(props: TooltipRendererProps<TDatum>) {
                 <td />
               </tr>
             ) : null}
-            {secondaryAxis.stacked &&
-            (focusedDatum.tooltipGroup ?? []).length > 1 ? (
-              <tr>
-                <td
-                  style={{
-                    paddingTop: '5px',
-                  }}
-                >
-                  <div
-                    style={{
-                      width: '12px',
-                      height: '12px',
-                      backgroundColor: dark
-                        ? 'rgba(0, 26, 39, 0.3)'
-                        : 'rgba(255,255,255,.2)',
-                      borderRadius: '50px',
-                    }}
-                  />
-                </td>
-                <td
-                  style={{
-                    paddingTop: '5px',
-                  }}
-                >
-                  Total: &nbsp;
-                </td>
-                <td
-                  style={{
-                    paddingTop: '5px',
-                  }}
-                >
-                  {/* {secondaryAxis.format(
+            {(focusedDatum.tooltipGroup ?? []).length > 1
+              ? props.secondaryAxes
+                  .filter(d => d.stacked)
+                  .map((secondaryAxis, i) => {
+                    return (
+                      <tr key={`${secondaryAxis.id}_${i}`}>
+                        <td
+                          style={{
+                            paddingTop: '5px',
+                          }}
+                        >
+                          <div
+                            style={{
+                              width: '12px',
+                              height: '12px',
+                              backgroundColor: dark
+                                ? 'rgba(0, 26, 39, 0.3)'
+                                : 'rgba(255,255,255,.2)',
+                              borderRadius: '50px',
+                            }}
+                          />
+                        </td>
+                        <td
+                          style={{
+                            paddingTop: '5px',
+                          }}
+                        >
+                          {props.secondaryAxes.length > 1
+                            ? secondaryAxis.id ?? `Axis ${i + 1} `
+                            : ''}
+                          Total: &nbsp;
+                        </td>
+                        <td
+                          style={{
+                            paddingTop: '5px',
+                          }}
+                        >
+                          {/* {secondaryAxis.format(
                   [...focusedDatum.group].reverse()[0].totalValue,
                   -1
                 )} */}
-                  {(secondaryAxis as AxisLinear<any>).formatters.scale(
-                    sum(focusedDatum.tooltipGroup ?? [], d => d.secondaryValue)
-                  )}
-                </td>
-              </tr>
-            ) : null}
+                          {(secondaryAxis as AxisLinear<any>).formatters.scale(
+                            sum(
+                              focusedDatum.tooltipGroup ?? [],
+                              d => d.secondaryValue
+                            )
+                          )}
+                        </td>
+                      </tr>
+                    )
+                  })
+              : null}
           </tbody>
         </table>
       </div>
diff --git a/src/components/Voronoi.tsx b/src/components/Voronoi.tsx
index cafa6df9..c7869864 100644
--- a/src/components/Voronoi.tsx
+++ b/src/components/Voronoi.tsx
@@ -3,7 +3,13 @@ import { Delaunay } from 'd3-delaunay'
 
 //
 import { Datum } from '../types'
-import { getPrimary, getX, getY, sortDatums, translate } from '../utils/Utils'
+import {
+  getPrimary,
+  getX,
+  getY,
+  sortDatumsBySecondaryPx,
+  translate,
+} from '../utils/Utils'
 import useChartContext from '../utils/chartContext'
 import { line } from 'd3-shape'
 
@@ -67,6 +73,8 @@ function PrimaryVoronoi<TDatum>({
     datumsByInteractionGroup,
   } = useChartContext<TDatum>()
 
+  const stackedVoronoi = secondaryAxes.length === 1 && secondaryAxes[0].stacked
+
   return React.useMemo(() => {
     const columns = series[0].datums
       .filter(datum => {
@@ -115,7 +123,7 @@ function PrimaryVoronoi<TDatum>({
                 d => d.id === datum.secondaryAxisId
               )
 
-              if (secondaryAxis?.stacked) {
+              if (stackedVoronoi) {
                 let range = secondaryAxis?.scale.range() ?? [0, 0]
 
                 let stackData = [datum.stackData?.[0], datum.stackData?.[1]]
@@ -144,7 +152,12 @@ function PrimaryVoronoi<TDatum>({
                 }
               }
 
-              const value = secondaryAxis?.scale(datum.secondaryValue) ?? NaN
+              const value =
+                secondaryAxis?.scale(
+                  secondaryAxis.stacked
+                    ? datum.stackData?.[1]
+                    : datum.secondaryValue
+                ) ?? NaN
 
               let range = secondaryAxis?.scale.range() ?? [0, 0]
 
@@ -158,7 +171,10 @@ function PrimaryVoronoi<TDatum>({
                 const prevAxis = secondaryAxes.find(
                   d => d.id === prev?.secondaryAxisId
                 )
-                const prevValue = prevAxis?.scale(prev.secondaryValue) ?? NaN
+                const prevValue =
+                  prevAxis?.scale(
+                    prevAxis.stacked ? prev.stackData?.[1] : prev.secondaryValue
+                  ) ?? NaN
                 secondaryStart = value - (value - prevValue) / 2
               }
 
@@ -166,7 +182,10 @@ function PrimaryVoronoi<TDatum>({
                 const nextAxis = secondaryAxes.find(
                   d => d.id === next?.secondaryAxisId
                 )
-                const nextValue = nextAxis?.scale(next.secondaryValue) ?? NaN
+                const nextValue =
+                  nextAxis?.scale(
+                    nextAxis.stacked ? next.stackData?.[1] : next.secondaryValue
+                  ) ?? NaN
                 secondaryEnd = value + (nextValue - value) / 2
               }
 
@@ -241,14 +260,15 @@ function PrimaryVoronoi<TDatum>({
       </g>
     )
   }, [
-    getOptions,
+    series,
     gridDimensions.left,
     gridDimensions.top,
-    datumsByInteractionGroup,
-    handleFocus,
     primaryAxis,
+    datumsByInteractionGroup,
     secondaryAxes,
-    series,
+    stackedVoronoi,
+    handleFocus,
+    getOptions,
   ])
 }
 
diff --git a/src/types.ts b/src/types.ts
index 0535a7f6..4fc8aeb5 100644
--- a/src/types.ts
+++ b/src/types.ts
@@ -249,7 +249,7 @@ export type AxisOptionsBase = {
   show?: boolean
   stacked?: boolean
   stackOffset?: typeof stackOffsetNone
-  id?: string
+  id?: string | number
   styles?: CSSProperties & {
     line?: CSSProperties
     tick?: CSSProperties
diff --git a/src/utils/Utils.ts b/src/utils/Utils.ts
index e657abe0..ac8143f6 100644
--- a/src/utils/Utils.ts
+++ b/src/utils/Utils.ts
@@ -267,7 +267,7 @@ export function getTickPx<TDatum>(scale: Axis<TDatum>['scale'], value: any) {
   return px
 }
 
-export function sortDatums<TDatum>(
+export function sortDatumsBySecondaryPx<TDatum>(
   datums: Datum<TDatum>[],
   secondaryAxes: Axis<TDatum>[]
 ) {
@@ -277,6 +277,7 @@ export function sortDatums<TDatum>(
 
     const aPx =
       aAxis?.scale(aAxis.stacked ? a.stackData?.[1] : a.secondaryValue) ?? NaN
+
     const bPx =
       bAxis?.scale(bAxis.stacked ? b.stackData?.[1] : b.secondaryValue) ?? NaN