Just changed the rears about 4 days ago and the rear drivers side is alsmost black. The rear pass. side didnt dust hardly at all yet. I didnt turn the rotors and the pads are crappy $18 Autozone. I think I need to just let them wear in a bit. Theres no way to adjust proportioning right? The first set of these pads went only 24K and thats on the rear! They have lifetime warr. that's why I got the same.

 

You need to make sure you don't have a caliper piston that's sticking...