the grips do 'shift" and you can force them to move one way or the other, on purpose or accidently, so just push them up, in place and tighten the screw, just do not over tighten...................as for the serial numer being "on an angle" oh well , one of many thousands that I have "seen" over the years from Colt, Smith,Ruger , DWA and on and on............just a manufactruing anomoly, and certainly NOT a good enough reason to 'reject" it...............the numbers gotta be all there and readable...seen some on some makes they use a "etch'; and rub enough ,long enough , and the numbers disappear................duh