diff --git a/gui/OpenFaceOffline/UI_items/MultiBarGraph.xaml.cs b/gui/OpenFaceOffline/UI_items/MultiBarGraph.xaml.cs
index 7f32909..9a25a6d 100644
--- a/gui/OpenFaceOffline/UI_items/MultiBarGraph.xaml.cs
+++ b/gui/OpenFaceOffline/UI_items/MultiBarGraph.xaml.cs
@@ -94,8 +94,10 @@ namespace OpenFaceOffline
             // Create new bars if necessary
             if (num_bars != data.Count)
             {
+                graphs = new List<BarGraph>();
                 num_bars = data.Count;
                 barGrid.Children.Clear();
+                barGrid.ColumnDefinitions.Clear();
                 foreach (var value in data)
                 {
                     BarGraph newBar = new BarGraph();
diff --git a/gui/OpenFaceOffline/UI_items/MultiBarGraphHorz.xaml.cs b/gui/OpenFaceOffline/UI_items/MultiBarGraphHorz.xaml.cs
index a4ece4a..519d447 100644
--- a/gui/OpenFaceOffline/UI_items/MultiBarGraphHorz.xaml.cs
+++ b/gui/OpenFaceOffline/UI_items/MultiBarGraphHorz.xaml.cs
@@ -121,6 +121,7 @@ namespace OpenFaceOffline
             {
                 num_bars = data.Count;
                 barGrid.Children.Clear();
+                barGrid.RowDefinitions.Clear();
                 graphs.Clear();
 
                 // Make sure AUs are sorted