Disco 2 V8 Brake Problem

hi any body help.
had problems with my abs pump, new pump fitted and lights gone out all working great.
one thing that i have noticed before changing the pump the rear drivers side pads had worn down really quick.
changed the pads and disc in feb this year now the same rear pads have worn again.
caliper is not sticking on all seems ok
any body got any clues as to what is going on.

thanks

could it be the traction control? or DHC?

no every thing is working ok and been tested on textbook.
thanks