Ignition Override,
IMO Mauser bolts are pretty straightforward, so I don't think there are a lot of things that can go wrong during assembly (again, IMO). I don't have a ton of experience with Mausers, but I can think of a couple of things that you could check. First would be the bolt sleeve. I would check and make sure that it was screwed completely into the bolt. Will the safety engage? If not, that may be your problem. The second would be the firing pin. I can't imagine that you bent it during imstallation (they seem quite robust), but that may explain the FTFs. Does the firing pin protrude from the bolt when it is uncocked?
Failing those 2 things, you may need some advice from some of the more experienced forum members.