diff --git a/engine/api.py b/engine/api.py
index 4298939..94bd84a 100644
--- a/engine/api.py
+++ b/engine/api.py
@@ -514,7 +514,7 @@ def setSwitchHalftoneTranspose(trackId, position, transpose):
     callbacks._trackStructureChanged(track)
     return True
 
-def insertSilence(howMany, beforeMeasureNumber):
+def insertSilence(howMany:int, beforeMeasureNumber:int):
     """Insert empty measures into all tracks"""
 
     #In each track shift every switch to the right if it is before the dividing measure number
@@ -532,16 +532,20 @@ def insertSilence(howMany, beforeMeasureNumber):
 
 def duplicateSwitchGroup(startMeasureForGroup:int, endMeasureExclusive:int):
     groupSize = endMeasureExclusive-startMeasureForGroup
-    insertSilence(groupSize, endMeasureExclusive)
+    insertSilence(groupSize, endMeasureExclusive) #insert silence handles multiplicator-tracks on its own
 
     for track in session.data.tracks:
-        for switch in range(startMeasureForGroup+groupSize, endMeasureExclusive+groupSize): #One group after the given one.
-            if switch-groupSize in track.structure:
+        thisTrackStartMeasure = startMeasureForGroup // track.patternLengthMultiplicator #integer division
+        thisTrackEndMeasure = endMeasureExclusive // track.patternLengthMultiplicator
+        thisGroupSize = groupSize // track.patternLengthMultiplicator
+
+        for switch in range(thisTrackStartMeasure+thisGroupSize, thisTrackEndMeasure+thisGroupSize): #One group after the given one.
+            if switch-thisGroupSize in track.structure:
                 track.structure.add(switch)
-            if switch-groupSize in track.whichPatternsAreScaleTransposed:
-                track.whichPatternsAreScaleTransposed[switch] = track.whichPatternsAreScaleTransposed[switch-groupSize]
-            if switch-groupSize in track.whichPatternsAreHalftoneTransposed:
-                track.whichPatternsAreHalftoneTransposed[switch] = track.whichPatternsAreHalftoneTransposed[switch-groupSize]
+            if switch-thisGroupSize in track.whichPatternsAreScaleTransposed:
+                track.whichPatternsAreScaleTransposed[switch] = track.whichPatternsAreScaleTransposed[switch-thisGroupSize]
+            if switch-thisGroupSize in track.whichPatternsAreHalftoneTransposed:
+                track.whichPatternsAreHalftoneTransposed[switch] = track.whichPatternsAreHalftoneTransposed[switch-thisGroupSize]
             callbacks._trackStructureChanged(track)
     session.data.buildAllTracks()
     updatePlayback()
diff --git a/qtgui/songeditor.py b/qtgui/songeditor.py
index b739058..18ec073 100644
--- a/qtgui/songeditor.py
+++ b/qtgui/songeditor.py
@@ -390,7 +390,9 @@ class TrackStructure(QtWidgets.QGraphicsRectItem):
             return
         menu = QtWidgets.QMenu()
 
+
         position = self.scenePos2switchPosition(event.scenePos().x()) #measure number 0 based
+        position = position * self.exportDict["patternLengthMultiplicator"] #We need the position in the global system, without the factor
         measuresPerGroup = self.parentScene.measuresPerGroupCache
         offset = position % measuresPerGroup
         startMeasureForGroup = position - offset