Steering Wheel Alignment Problem
 

My car was professionally aligned and corner balance by a reputable Porsche shop over the summer. Since then I brought the car back because the steering wheel became off centered. It was straightened out and I just have done my second auto-cross today. The steering wheel was fine until I left the parking lot. If 12 o'clock is centered, it's now in the 2 o'clock position when straight. The car drives straight. I'm thinking maybe the U bolts on the steering shaft are loosing their grip on the shaft. Has anyone had this problem? Thanks

Do you have a front strut brace? My car without a brace did the same thing after an autox

I do have one. It's the Wevo camber king which is really nice. Your strut bar really help the the misalignment from reoccurring?

Something is slipping. A camber bar helps while the car is in the corner. Once it is out of the corner the only way it would effect anything is if the chassis is so toasted that it was yielding (permanently bending) under the cornering forces.

The two things I would look at is if the rack is moving/slipping from side to side or if the steering column/u-joint/rack connection is slipping some how. Something is moving under force so it needs to be straitened out before something bad happens.