You need to redesign your system. Repeating fields shouldn't be used. Orders should have a child table, OrderLineItems, that are shown in a portal on the Order form. Orders are printed by going to the related OrderLineItems and printing.
As a point of information, in FM11 you could group your repetitions into page-length groups, the first set being repetitions 1-20, say, and the second 21-40. But I only give it as a point of information for other cases where that might be a useful pointer. The advice from bcooney is spot on, and well worth the effort now.