GoldGS

Last weekend I decided to give my GS a little upgrade. I installed Tanabe NF210 springs and new KYB struts all the way around. I'm really satisfied with the looks and handling now. I have a problem though. I took the car to have it aligned and every wheel came within spec except the left rear. It's showing -1.7* camber. The alignment guy said he can't get it in spec. None of the suspension parts are bent or broken so I'm not sure why only 1 wheel is that far off? Should I take it to another shop to have it aligned again, or should I just buy the camber kit from SPC. It seems strange to me that only 1 wheel can't be aligned and that its so far out of spec. Anyone have any input that might lead me to an answer? Thanks in advance.