Hit a massive pothole a few months back which has cost me way too much money, and after a realigment this morning (as well as getting a broken wheel bearing replaced), now my cruise control is messed up to. I set it at 70 mph, it drops to 65 before holding the speed there, still showing it is set at 70. Increase cruise to 71, it might go all the way up to 70 before holding the speed there. But it might also just increase to 66. Incredibly inconsistent. On my way home it held speed at 30 when set to 30, and held at 40 when set to 40, but again showed inconsistency holding at 33/34 when set to 35. Any ideas as to what could be causing this?

2009 Mk 2 Audi TT 2.0 FWD