Folding and Stapling a Booklet on Bizhub C250

I am trying to print a booklet with two pages front and back from publisher 2007 on a Konica Minolta Bizhub C250 and when I print one copy it folds and staples fine. When I print two or more copies the machine prints all the pages, then staples them all together and folds them. I've tried to print a bunch of different ways (with collate checked and unchecked) but it still happens. I need to print out a few hundred booklets and do not want to print them one at a time. Any ideas?