diff --git a/OpenXmlPowerTools.Tests/HtmlToWmlConverterTests.cs b/OpenXmlPowerTools.Tests/HtmlToWmlConverterTests.cs
index 3bec4ffe..f2a10a66 100644
--- a/OpenXmlPowerTools.Tests/HtmlToWmlConverterTests.cs
+++ b/OpenXmlPowerTools.Tests/HtmlToWmlConverterTests.cs
@@ -282,6 +282,8 @@ public class HwTests
         [InlineData("T1830.html")]
         [InlineData("T1840.html")]
         [InlineData("T1850.html")]
+        [InlineData("T1860.html")]
+        [InlineData("T1870.html")]
 
         public void HW001(string name)
         {
diff --git a/OpenXmlPowerTools/HtmlToWmlConverterCore.cs b/OpenXmlPowerTools/HtmlToWmlConverterCore.cs
index 438c57a2..c01aff35 100644
--- a/OpenXmlPowerTools/HtmlToWmlConverterCore.cs
+++ b/OpenXmlPowerTools/HtmlToWmlConverterCore.cs
@@ -2829,9 +2829,9 @@ private static XElement[] GetSpacingProperties(XElement paragraph, HtmlToWmlConv
             // todo should check based on display property
             bool numItem = paragraph.Name == XhtmlNoNamespace.li;
 
-            if (numItem && marginTopProperty.IsAuto)
+            if (numItem && marginTopProperty != null && marginTopProperty.IsAuto)
                 beforeAutospacing = "1";
-            if (numItem && marginBottomProperty.IsAuto)
+            if (numItem && marginTopProperty != null && marginBottomProperty.IsAuto)
                 afterAutospacing = "1";
             if (marginTopProperty != null && marginTopProperty.IsNotAuto)
             {
diff --git a/OpenXmlPowerTools/HtmlToWmlCssApplier.cs b/OpenXmlPowerTools/HtmlToWmlCssApplier.cs
index 07c7367d..37f9ba1b 100644
--- a/OpenXmlPowerTools/HtmlToWmlCssApplier.cs
+++ b/OpenXmlPowerTools/HtmlToWmlCssApplier.cs
@@ -1427,6 +1427,10 @@ public static CssExpression GetInheritedOrInitializedValue(Dictionary<string, Cs
                     throw new OpenXmlPowerToolsException("Internal error");
                 newPtSize = (unit == CssUnit.EM) ? decFontSize * decValue : decFontSize * decValue / 2;
             }
+            else if (unit == CssUnit.REM)
+            {
+                newPtSize = settings.DefaultFontSize * decValue;
+            }
             else
             {
                 if (unit == null && decValue == 0d)
@@ -1515,6 +1519,8 @@ private static CssExpression ComputeAbsoluteFontSize(XElement element, CssExpres
                     newPtSize = ptSize / 2 * decValue;
                 if (unit == CssUnit.Percent)
                     newPtSize = ptSize * decValue / 100d;
+                if (unit == CssUnit.REM)
+                    newPtSize = settings.DefaultFontSize * decValue;
             }
             else
             {
diff --git a/TestFiles/T1860.html b/TestFiles/T1860.html
new file mode 100644
index 00000000..dacc5f18
--- /dev/null
+++ b/TestFiles/T1860.html
@@ -0,0 +1,30 @@
+<!DOCTYPE html>
+<html>
+<meta charset="UTF-8"/>
+
+<style>
+ol {
+  list-style-type: none;
+  margin: 0;
+  padding: 0;
+}
+
+ol > li {
+  display: table;
+  counter-increment: item;
+  margin-bottom: 0.6em;
+}
+
+</style>
+
+<body>
+
+<section >
+    <ol>    
+      <li>  
+          <span >Description</span>
+      </li>
+    </ol>
+</section>
+</body>
+</html>
diff --git a/TestFiles/T1870.html b/TestFiles/T1870.html
new file mode 100644
index 00000000..11f3ab5b
--- /dev/null
+++ b/TestFiles/T1870.html
@@ -0,0 +1,16 @@
+<!DOCTYPE html>
+<html>
+<meta charset="UTF-8"/>
+<style>
+
+h2 {
+  margin-top: 2rem;
+}
+
+</style>
+
+<body>
+  <h1>Test1</h1>
+  <h2>Test2</h2>
+</body>
+</html>
