Hello Rei,
If you have already followed the instruction found here for mixed originals, I would suggest calling into the support department @ 1-800-835-6100.
Hello, I have the Xerox WorkCentre 6515DN MFP. I have a document with legal and letter sized paper/pages. No matter what option I chose (and tried every configuration possible), it either prints all pages on letter or all pages on legal. I can't get my mixed document to print on both paper sizes. My trays are set up corectly.
Firmware 65.51.71
Driver 5.10.1