I just put new pads and rotors on the rear of my double ought SE. I noticed that now that the pistons have worked their way back out to where the pedal is nice and firm, the parking brake seems to hang up a little after releasing it. I loosened the adjustment nut all the way and it still does it. It is worse on one side than the other, but both of them end up smoking a little after driving. Are both calipers toast or is there another way to remedy this?