Thanks for contacting us. I have two suggestions:
1. Please make sure you have defined a boarder layer for each job that will be included in the panel. Without it FAB 3000 must use the overall extents for each job. Here's a forum post that may be helpful
2. Feel free to save and send me a sample FAB 3000 workspace file (*.wrk). I'll be happy to take a look and instantly determine the cause of any problem.