Not sure about your model but, I have seen this happen when the person doing the alignment did not "center" the steering wheel before starting the alignment. Therefore he adjusted everything underneath the car as straight with the wheel cocked. When you took it back he probably just adjusted the tie-rod in one turn on one side and turned the other side out one turn. This keeps the alignment true and the wheel back in center. Probably didn't want to tell you too much because it's a pretty bonehead mistake.