well, no, it can't go out of timing on its own if it was assembled correct.
If it were my car I'd want those cam marks to be spot on with a stock engine.....look at the below photo of the exhaust cam.....dead on
But I think I see a problem: can you confirm, as I suspected it was, that the cam cap we are seeing in your photo is in fact the
inlet side?
If your photo (below) is the inlet side AND if that number stamped on the cap is indeed a "1", then he has put the cap on the wrong cam.
the no. 1 cap follows the no 1 stamping on the head...and that is the no 1 exhaust cam cap.
but I might just be seeing things.........hopefully I am wrong, but if not I sure hope he did not mix up all your cam caps.