I installed new rear brake pads not so long ago, and then burnished the brakes. I recently removed the rear brakes again to install new brake pad retainers as the originals sent by Rockauto.com were the inccrrect size (see Rear Brake Pad Retainers Do Not Fit). I have only used the vehicle about 4 occasions since installing the rear brake pads but the pads to not appear to be correctly installed/working properly. The inside rotor is wearing as you would expect but the outside rotor is only wearing on the outer half. Before installation photo of rear rotor follows: After installation and minimal use photos follow: The brake pads are Raybestos Element 3 EHT1101H procured through rockauto.com: The new brake pad retainers look identical to the original ones. They fit tightly into the caliper but the brake pad itself is very hard to maneuver into position. I am putting CRC synthetic Brake & Caliper Grease on the retainers and the back of pads. Should I attempt to file the brake pad ears so they fit a little easier into the brake pad retainers? Just drive the Xterra for a while hoping the pads will settle into place? Suggestions?