I have about 3 times more brake dust on my drivers side front wheel compared to the passenger side. What could cause this bad caliper/

 

Have you taken a look at the brakes yet? Could be the driver's side pads just dust more than the passenger's, due to loose manufacturing tolerances, different types/brands of pads installed on either side, etc.

It's not exactly a diagnostic aid, the amount of brake dust on your wheels. Take the wheels off and actually take a look.

 

get ebc pads

 

that or figure out what the REAL problem is