Sorry. I should have mentioned that the stud was 1/16" to 3/32" off center, i.e. angled away from the rebound slide. The picture shows the stud now in proper position. Everything functions as it should.

My only concern is having been moved back then forward (even slightly) will the steel be compromised/weaker to the point it could fail? Sorry, but I don't know the 'science' of metals.