Sounds like your right with the tracking I had a friend check it today, he said it was a mile out, this is after Audi have so called set all the Geometry up on the car.
I wouldn't mind if the car was just pulling to the left, but the tyre wear is rearly pi$$ing me off now.
I will find the print outs that Audi gave me when they set the car up and see what settings the car is at.
Cheers
Mossy