diff --git a/src/sas/qtgui/MainWindow/DataExplorer.py b/src/sas/qtgui/MainWindow/DataExplorer.py
index fcad8c5197..bd97543d0a 100644
--- a/src/sas/qtgui/MainWindow/DataExplorer.py
+++ b/src/sas/qtgui/MainWindow/DataExplorer.py
@@ -1044,7 +1044,10 @@ def isPlotShown(self, plot):
         """
         if not hasattr(plot, 'name'):
             return False
-        ids_vals = [val.data[0].name for val in self.active_plots.values()]
+
+        ids_vals = [val.data[0].name for val in self.active_plots.values()
+                    if val.data[0].plot_role != Data1D.ROLE_DATA or
+                    isinstance(val.data[0], Data2D)]
 
         return plot.name in ids_vals
 
diff --git a/src/sas/qtgui/MainWindow/UnitTesting/DataExplorerTest.py b/src/sas/qtgui/MainWindow/UnitTesting/DataExplorerTest.py
index 7978c4b1b2..c6c0ce247b 100644
--- a/src/sas/qtgui/MainWindow/UnitTesting/DataExplorerTest.py
+++ b/src/sas/qtgui/MainWindow/UnitTesting/DataExplorerTest.py
@@ -14,14 +14,14 @@
 import path_prepare
 
 # Local
-from sas.qtgui.Plotting.PlotterData import Data1D
+from sas.qtgui.Plotting.PlotterData import Data1D, Data2D
 from sas.sascalc.dataloader.loader import Loader
 from sas.qtgui.MainWindow.DataManager import DataManager
 
 from sas.qtgui.MainWindow.DataExplorer import DataExplorerWindow
 from sas.qtgui.MainWindow.GuiManager import GuiManager
 from sas.qtgui.Utilities.GuiUtils import *
-from UnitTesting.TestUtils import QtSignalSpy
+from sas.qtgui.UnitTesting.TestUtils import QtSignalSpy
 from sas.qtgui.Plotting.Plotter import Plotter
 from sas.qtgui.Plotting.Plotter2D import Plotter2D
 import sas.qtgui.Plotting.PlotHelper as PlotHelper
@@ -917,6 +917,99 @@ def testClosePlotsForItem(self):
         self.assertEqual(len(PlotHelper.currentPlots()), 0)
         self.assertEqual(len(self.form.plot_widgets), 0)
 
+    def testPlotsFromMultipleData1D(self):
+        """
+        Tests interplay between plotting 1D datasets and plotting
+        a single 1D dataset from two separate fit tabs
+        GH issue 1546
+        """
+        # prepare active_plots
+        plot1 = Plotter(parent=self.form)
+        data1 = Data1D()
+        data1.name = 'p1'
+        data1.plot_role = Data1D.ROLE_DATA
+        plot1.data = data1
+
+        plot2 = Plotter(parent=self.form)
+        data2 = Data1D()
+        data2.name = 'M2 [p1]'
+        data2.plot_role = Data1D.ROLE_DEFAULT
+        plot2.data = data2
+
+        plot3 = Plotter(parent=self.form)
+        data3 = Data1D()
+        data3.name = 'Residuals for M2[p1]'
+        data3.plot_role = Data1D.ROLE_RESIDUAL
+        plot3.data = data3
+
+        # pretend we're displaying three plots
+        self.form.active_plots['p1'] = plot1
+        self.form.active_plots['M2 [p1]'] = plot2
+        self.form.active_plots['Residuals for M2[p1]'] = plot3
+
+        # redoing plots from the same tab
+        # data -> must be shown
+        self.assertFalse(self.form.isPlotShown(data1))
+
+        # model and residuals are already shown
+        self.assertTrue(self.form.isPlotShown(data2))
+        self.assertTrue(self.form.isPlotShown(data3))
+
+        # Try from different fit page
+        plot4 = Plotter(parent=self.form)
+        data4 = Data1D()
+        data4.name = 'M1 [p1]'
+        data4.plot_role = Data1D.ROLE_DEFAULT
+        plot4.data = data1
+        # same data but must show, since different model
+        self.assertFalse(self.form.isPlotShown(data4))
+
+    def testPlotsFromMultipleData2D(self):
+        """
+        Tests interplay between plotting 2D datasets and plotting
+        a single 2D dataset from two separate fit tabs
+        GH issue 1546
+        """
+        # prepare active_plots
+        plot1 = Plotter(parent=self.form)
+        data1 = Data2D()
+        data1.name = 'p1'
+        data1.plot_role = Data1D.ROLE_DATA
+        plot1.data = data1
+
+        plot2 = Plotter(parent=self.form)
+        data2 = Data2D()
+        data2.name = 'M2 [p1]'
+        data2.plot_role = Data1D.ROLE_DEFAULT
+        plot2.data = data2
+
+        plot3 = Plotter(parent=self.form)
+        data3 = Data2D()
+        data3.name = 'Residuals for M2[p1]'
+        data3.plot_role = Data1D.ROLE_RESIDUAL
+        plot3.data = data3
+
+        # pretend we're displaying three plots
+        self.form.active_plots['p1'] = plot1
+        self.form.active_plots['M2 [p1]'] = plot2
+        self.form.active_plots['Residuals for M2[p1]'] = plot3
+
+        # redoing plots from the same tab
+        # data -> Already there, don't show
+        self.assertTrue(self.form.isPlotShown(data1))
+
+        # model and residuals are already shown
+        self.assertTrue(self.form.isPlotShown(data2))
+        self.assertTrue(self.form.isPlotShown(data3))
+
+        # Try from different fit page
+        plot4 = Plotter(parent=self.form)
+        data4 = Data2D()
+        data4.name = 'M1 [p1]'
+        plot4.data = data1
+        # same data but must show, since different model
+        self.assertFalse(self.form.isPlotShown(data4))
+
 
 if __name__ == "__main__":
     unittest.main()