You may want to have them check to make sure they have the correct springs on the correct sides. From what I recall (w/OME springs at least) there are driver's side and passenger side specific coils because of the difference in weight of the two sides.

The driver's side has the driver, the gas tank, and the transfer case (I think).

One other thing is I noticed mine leaning (again w/OME) and I also discovered one of my sway bar endlinks was broken. I put a new one on and it leveled back up.