I've had this problem for years. I used to have Magix Music Maker 15 and this would seem to happen at random, causing me to constantly delete auido tracks and re-record them.. Quite frustrating. I now have Magix Music Maker 2015 and I am now experiencing this problem yet again. I open one of my arrangements and some of the recordings are permanently switched to recordings from other arrangements.. Is there any way to fix this or prevent this from happening? Has anyone else ever encountered this problem??