I am having the same exact issue. When I do it manually, the margins don't even come close to lining up and each document is off in different way than the one prior. EXTREMELY FRUSTRATING!
I recently purchased the Xerox C315 and am having trouble trying to get it to print duplex on card stock. Can it not print on card stock? Every time I try to print duplex on anything other than plain paper it will print only on one side of each sheet of paper so will end up printing the job on 2 separate sheets of paper :(
One of the main reasons I purchased this printer is so that I could do some professional printing at home, printing out some of my own business cards, greeting cards, etc. like I used to do on the Xerox 6280DN.
The card stock I am printing on is 67lb, not even a very thick card stock. PLEASE tell me that somehow I will be able to print on the card stock.
I even tried doing it manually by first printing out ne side, then putting the paper back in to print on the other side but the printer doesn't even print in the same spot on the other side and so everything is out of alignment.
I never had these issues with my trusty 6280DN printer :(