I'm still skeptical about the alignment. Especially since they're claiming that it was "adjusted as close to spec as it could be". You might check the upper control arm on the right front, see how many, if any, shims are present. If there's any shims in there, especially at the front of the control arm, then they should have been able to adjust the camber in. Also, for stability with the larger rear tires (I do agree with Bill about having same size all around, unless OEM uses mismatched, in most cases), they should have laid the caster back, say about 3-3.5 degrees.
