I would look in the help guide, but from what I can tell it sounds more like a software problem. You might want to see if there's a update availible for the program.
What you want to do is this.
Final picture
Layer 1
Layer 2
Layer 3
Layer 4
Layer 5
Then of course the blaster fire are all on different layers
What I did for the Clone Troopers in pics 2-5 was erase all the background stuff then place them in pic 1. Then I resize and fix anything else I didn't like. Like I said it sounds like a software problem. I'm not sure because I'm not sitting there watching what's happening. Look for updates that might help. I'm not familar with the program but it's been my experience that it's more than likely something that simple.
Hope this helps.