Epson printer moves image 1/2" periodically

[epsonproblems]

I have used an epson 4880 and p800 with several operating systems on several different computers. When I print from Corel Draw, sometimes it moves the image on the page up 1/2". I print again, and it is aligned correctly. I print from a different program and it does the same thing. I have contacted Epson and they tell me that it is the computer, the OS, the program, any excuse they can think of other than it is a driver problem.
Any thoughts on how to fix this?

 

[Shadowman]

Have you checked the page setup (margins, etc.) in Corel Draw?