Seen similar symptoms in various version of Word for a few reasons which gives me a quick list of stuff to check: Conflict between the paper sizes (A4, Letter) for the document and the printer set-up. The (old style tractor drive) printer had a physical limit with cut paper that meant it cold get to the very bottom of the page (you don't say what printer) but the document was orginally formated using a laser printer. There was a graphic in the footer that rose to the top in print preview but innormal view you saw the text because the footer way "grayed out". And one was because of a conflict in page & footer size margin where the file had some sort of corruption.
Hope this gives you somewhere to start.