I went to the parts store to buy front brakes and rotors for my 2012 dodge journey and they told me there are two different styles a BRE and BRF. I do not know what it has so I decided to bring them in and match them up. as i was getting ready to take them apart i noticed that the pads are wearing about a half inch from the edge of the rotor, I dont think this is supposed to happen. My question is how do I know what pads to get? I don't think the right parts are on there now and if I just bring what I have to the parts store to match them up I will be putting the wrong parts back on again.