[Fen335i]

Ok, my z4m roadster recently got two new rear tires ( we chewed through the previous set very quickly), so I decided to have an Indy shop do a 4 wheel alignment. Here is what they came back with both before and after numbers:

Right rear
Camber before: -1.3
Camber after: -1.4
Toe before: .13
Toe after: .14

Left rear
Camber before: -2.1
Camber after: -2.1
Toe before: .16
Toe after: .19


Why would my right rear camber be so different than the left side? Specified oem range is -2.0 - -2.5. So left side is ok, but right side is way off. Could this be the reason for chewing through tires so quickly? Could my rear trailing arm bushings be going bad already? The car has about 50,000 miles on it.