Hello disciplepress,
I searched the Knowledgbase and found this article for color registration issues that may help you.
Xerox Versant 2100: I am having a problem with the color registration on the second side of a duplex print. I have tried several different files and tried playing with the stock type settings but nothing changes. The color registration is fine on the front side, but the back side all the colors are off. Photos look blurry because the colors are not registering. There is a gray duplication on all the back text that is off to the left side of the text. I cannot find a color registration adjustment option on the machine. Can anyone help?
UPDATE: I just tried printing another file with lighter colors on it and both sides have a registration issue. How do I adjust this color registration?