Could be problem with the balance job/tire/wheel assy. Happens a lot! Not all balancers & mounting adapters are created equal! I would find a shop that has the proper adapters to center wheel on balancer via lug nut holes(same as on the vehicle) vs center hole. Lug-centric balancing.
I would suggest that you go to
www.hunter.com and click on the red "contact hunter" option in upper RH corner. This will give you the sales & service reps in your area. They should know what shops in your area have the proper equipment/technicians to diagnose your situation if it is indeed a tire/wheel problem.
Hope this helps, Mike