Without digging into detail...
- either the tech is incompetent
- remote possibility of arms being installed on the wrong side (left and right side not interchangeable)
- you are slammed and past SPC's adjustment range?
It would help if you can specific what is currently off (camber, toe or caster)?
How low is your ride height? Slammed?
Which version of SPC FUCA did you buy? There are two versions.