driver side brakes heating up way more than pass side

ok, but why would only the driver side be getting hotter than the pass. side? Everything was tightened up the same. All 4 wheels have a little bit of play when you grab it either at 6 and 12 or 3 and 9.

When I got the new backing plate assemblies, the guy asked me what color wire magnets I had and told him white. We got the new ones with black wire insulation. Could a different magnet on the one side be causing the issues? (Yes, I made sure to get lefts on the left sides and rights on the right sides.)