For use with lazy-portrait narrow-end to narrow-end (LPEE) formatted document pages printed on a continuous web of material, a system and method for assembling correctly page-sequenced document sets that utilizes a slitter for separating the LPEE formatted document pages into two separate streams of continuous sheets, a turn-bar assembly positioned to flip only one of the continuous sheet streams, a cutter that produces separates pages from both the flipped stream of sheets and non-flipped stream of sheets, a collator for collating all of the separate pages into the correctly page-sequenced document sets, and a controller for tracking the LPEE formatted document pages and overseeing the assembly of the correctly page-sequenced document sets.