Changing rear pads and rotors

Hello, it does sound like the caliper on this one troublesome side has a concern with the piston retracting completely, allowing the caliper to then line up in then bracket properly. Do you have the special tools needed to turn the caliper piston in properly? Have you ensured the slots in the caliper piston line up with the pad? Use this link to find some shops near you that can help with your concern: www.repairpal.com/repair-shops