Jim, you kill me!
Dealers being the only one qualified to align a jeep with a solid axle? To be perfectly frank there is a reason why they say there is a smart end and a dumb end of a tape measure. To most alignment shops including dealers, they will only "adjust" toe setting anyway. Resetting steering wheel straight goes without saying..A jeep with a slight pull to one side...brake caliper hanging, tire pressure/or rotation, bent housing, worn steering or suspension parts, rear axle out of alignment via thrust angle...are all possible causes that most of the time are never even looked at during a routine alignment.If it pulled sometimes to one side, then other times to the other side I'd look for toe to be off.
1/8" in is the industry standard...a tape measure can test toe, track bar axle centering, basic thrust angle, rear axle and front axle square in relation to the frame..
Don't expect that kind of attention from an alignment shop.
A tire store would never mess up your alignment to sell tires..that would be madness. Any business that wants more business will try and do a good job...

SD