I have a Canon MX922 printer. I print "duplex" most of the time when I don't want to waste paper for something that is more than one sheet. Now, all of a sudden, when i click the "duplex" box, it prints on both sides of the paper, but the 2nd sheet is "upside down". I have changed nothing. Anyone have any suggestions that I can try? I need to print something off that is 35 pages or so, and I don't want it single sheets (if possible).