Clay,
You or the shop should have road tested it before giving them the thumbs up. It's probably been too long since you had it done to go back and say do it again (gratis). I'd suggest talking to them and see what they can do for you. If they're reputable, they should work with you on this.
However, if your corner balance equipment is off, this could explain the car's abnormal handling symptoms.
Sherwood Lee
http://members.rennlist.org/911pcars