diff --git a/Mk0.Software.ImageSorter/Main.cs b/Mk0.Software.ImageSorter/Main.cs
index 75152d1..40040a6 100644
--- a/Mk0.Software.ImageSorter/Main.cs
+++ b/Mk0.Software.ImageSorter/Main.cs
@@ -2137,7 +2137,7 @@ namespace Mk0.Software.ImageSorter
                     }
                     //rechts neue pb erstellen
                     int pIndex = imageIndex;
-                    pIndex += previewNumber + 1;
+                    pIndex += previewNumber;
                     if (pIndex >= images.Count() || pIndex < 0)
                     {
                         pIndex = 0;
@@ -2216,6 +2216,7 @@ namespace Mk0.Software.ImageSorter
         {
             var pb = (PictureBox)sender;
             LoadPicture((int)pb.Tag);
+            ShowPreviewImages();
         }
 
         /// <summary>