I have orthophotography files (ecw and sid) in model space via mapinsert. I draw lines, etc over them in model space. I make 2 or more viewports per layout tab. When I scroll in and out in paperspace (viewports locked), the lines, etc. shift back and forth in relation to the image. One or both or neither of the viewports print out with the lines I drew aligned as in model space. There is no control over this. TIF files do not do this. Any help?