I might have your solution.
Okay, so remember that your printer and the
computer you sent the file from are two different entities. If you're like me, then you send the file to a RIP software, and then release the ripped file to the printer. I'm guessing that every now and then you realize that there is a problem and try to stop it printing at the printer.
The problem is, that your
computer is still sending data. Your printer can stop printing, but something isn't allowing it to disregard the data that is still coming through from your
computer. So long as your
computer keeps on sending instructions.
The solution (at least for me) was to come over to the
computer and abort the print in the RIP software
and cancel the print on the printer interface. Hope that helps.