Less than two years ago, I replaced the rotors, calipers, brake pads, and associated small hardware. Starting hearing a grinding noise, so pulled it apart and noticed that the pads were eaten up, rotor was scored. I then replaced all parts last week again on passenger side and bled the brakes. Today wife is driving home and smelled something and not long after it started making the same noise all over again. Noticed the rim is also very hot. So it tells me its dragging still. The driver side is not having any issues. What would cause one caliper to drag and not the other? I believe that since we replaced all parts last week, it is unlikely to be the new caliper. Any ideas?