I've recently installed a new Campy Centaur bottom bracket into an 80s italian frame. After a bit of riding, I noticed that the entire BB shifted over towards the drive side. To clarify, the left side has threaded further into the BB shell and the right side, the drive side, has unthreaded quite a bit. So much so that I cannot shift to the outer chainring. Is this just a result of not tightening the drive side enough? Is this common? Thanks.