If the bullet had jumped crimp that far, then it most likely was jammed into the rifling and wasn't letting the slide close fully into battery - hence, no fire. Of course, being jammed into the rifling, it'd be difficult to extract, so the slide would feel hard jammed. AND of course, a quick tap with a rod down the barrel, the smith could knock it free in a heartbeat.
All cartridges need some level of crimp tension. Autopistol rounds should not have a roll crimp, but they still need enough taper crimp to hold the bullet in the case.
It's a bit odd, however, if you had such light neck tension that the bullets jumped the crimp within 2rnds, I would have expected it to have little enough that you'd have simply pulled the bullet and left it in the rifling when you tried to extract it. Must have just been enough crimp to stop you from pulling it by hand, but not enough to hold strong in the case.