I do totally agree, I think if you're silly enough to get your car defected three times then they're bound to pick on you.
It just seems silly to me that such an obvious defect was not picked up earlier. My point is just the inconsistencies in the way everything works. You get different people looking at the cars and different defects being pointed out each time.
They should all be looking for the same things and not overlooking obvious things such as a bent chassis rails.. Dean can vouch for this too, they didn't pick it up the first time, but second time around, there was the defect.