JJIII55

Need a little input from other owners please. My new '06 drove straight as an arrow when I picked up the car at the end of October however after driving it for a short while I noticed the steering wheel to be off center to the left. It wasn't terrible but it drove me crazy after putting up with it for about the first thousand miles. I then took it to the local dealer and had them fix the issue. Ever since the car has been pulling to the Right. I took it back yesterday and they can't seem to get the pull to go away. After a day of messing with it they switched the tires from one side to the other to see if that made a difference and it didn't. The car is still at the dealer and they are going to resume work on Monday morning. They don't seem to know what the problem is and I am starting to lose faith in the tech. Is it them or is there a common problem with the car? Any help would be much appreciated.