I've read a bunch of threads on this site about caliper issues but I still have some questions.

My scenario is that I changed out the (rear) pads and rotors. Retracted the caliper pistons using the correct tool and everything seemed good. I did bottom-out the piston on both sides but verified that they *appeared* to be working correctly before remounting the wheels.

Tonight we drove 12 miles to and from a restaurant and when we got home the passenger-side rear brake was smoking. (great...)

I let things cool down a bit and when I got the wheel off, I had my wife depress the brake pedal several times. The piston appears to extend and retract correct but not enough so that the hub/rotor can turn freely without some effort.

It would appear that the outer pad isn't retracting enough, but that pad really just goes along for the ride. If the rotor can't turn freely, doesn't that mean that the caliper piston isn't really retracting enough?

Am I looking at a new caliper here?

 

Yep. Finally took it to a shop today. Two new (rear) calipers needed.

Suck.