diff --git a/ArmA.Studio/SolutionUtil/SolutionFileBase.cs b/ArmA.Studio/SolutionUtil/SolutionFileBase.cs
index 5870993..369604c 100644
--- a/ArmA.Studio/SolutionUtil/SolutionFileBase.cs
+++ b/ArmA.Studio/SolutionUtil/SolutionFileBase.cs
@@ -338,11 +338,11 @@ public virtual int CompareTo(object obj)
         {
             if ((obj is SolutionFolder) && !(this is SolutionFolder))
             {
-                return -1;
+                return 1;
             }
             else if (!(obj is SolutionFolder) && (this is SolutionFolder))
             {
-                return 1;
+                return -1;
             }
             else if (obj is SolutionFileBase)
             {
diff --git a/Utility/Collections/ObservableSortedCollection.cs b/Utility/Collections/ObservableSortedCollection.cs
index 6502a97..21131fc 100644
--- a/Utility/Collections/ObservableSortedCollection.cs
+++ b/Utility/Collections/ObservableSortedCollection.cs
@@ -42,7 +42,7 @@ public void Sort()
                 {
                     var it1 = (T)this.InnerList[i1];
                     var compRes = it0.CompareTo(it1);
-                    if (compRes < 0)
+                    if (compRes > 0)
                     {
                         hasChange = true;
                         this.InnerList[i0] = it1;