Alignment issues on my 2009 370z

[Wilson2608]

Hey everyone! First off I appreciate any and all responses because I don't even know where to start looking for this issue. I went to Firestone to get my tires aligned because my steering wheel was offset and not centered. (It was slightly tilted left) Everything went well and the car seemed to be steering straight with no steering issues. 2-3 weeks later the steering wheel is titled to the right and idk why. One of the nuts on my strut tower bar is missing due to having to cut it off (was cross threaded on) and in the process I tore up the bolt it goes on not allowing me to screw another nut on there if that could possibly be the issue ? Mods are BC coilovers, spc rear camber arms( toe bolts not yet installed). I went again today to get the tires realigned in hopes it was just a shop screw up and once they handed me the pre measurements ( before they make adjustments) everything was off. Camber, toe, caster etc. and this was only from 3 weeks of driving. If anyone has any ideas please help me out!