Printing Malfunction with the Canon Pixma MP160

Question

I have 2 MP160 printers both linked to computers running Vista. Both printers have the same problem - they often jump to print on page 2 when page 1 is only a few lines full, then they jump to print on page 3 when page 2 is only a few lines full and so on. It happens more often when printing in colour than in black and white but in either case I get a single page document printed over about 6 pages. Any ideas?