First, the dork disc has ZERO effect on the axle spacing. Not sure how that idea could have been conjured up.

If the axle and bearings were adjusted properly before taking the wheel in, and was loose afterward, most likely the drive side bearings are no longer set correctly. In some cases, based on the type of freewheel, the wall thickness of the freewheel tool, and the size of the outermost nut, sometimes that nut needs to be removed in order to fit the remover tool. If that's what the LBS had to do, and they didn't tighten that nut back down properly, especially if there is not a separate locknut between the cone and the spacer, then that side will need to be checked.