I was leaving a store the other day pulling out of the parking lot and stopped in the entrance way, the steering wheel was almost a half a turn from the straight ahead position...wheels where straight ahead so it gets worse if say the rear wheels are on level ground and the front wheels are headed down hill and you stop. I have noticed on mine at least there seems to be a slight clearance between pad and rotor unlike any other I have ever seen where they are pretty much rubbing the rotor..if that clearance through bleeding of brakes ect ends up all on one side it creates a one brake apply before the other scenario, the steering wheel movement IMO is a result of one wheel braking and a change in the camber/caster. I have not been able to bleed out this clearance which I noted...but I can take my calipers on and off easily from the rotor and on any other car I have ever worked on, they usually need to be encouraged off.
A powerbleeder vs the pump and hold method might create a different end pad/rotor clearance or somehow balance out the clearance which exists. It seems to me the design was intentional to prevent any brake drag at all (imo). I did my front brakes to try an eliminate this pull, I checked the caliper operation...I see nothing that points to the caliper, and I will depending on the lay of the land get the same type of pull to the passenger side with the same steering wheel movement....rear bushing's can create this, but mine "look" fine. I also thought maybe it was the bushings in the front subframe but I don't see any movement there either.
Keep us posted Rabbit...I have a swaybar coming and some ultra racing supports...going to make this car work right if it kills me.