C6180 alternates between portrait and landscape

When printing legal-sized documents, the pages alternate between
portrait and landscape. If I print 1 page at a time, then it prints
portrait as it should. But if I print multiple pages, ever other page
prints landscape using a font that is flattened and elongated (i.e.
unreadable). This happens whether I am printing a PDF or Word
document.

I have Windows XP. I don't have the entire suite of C6180 utilities
loaded because they were so buggy and I couldn't get my printer to
work. I just have the basics loaded.

Thanks
Joe