offset bushings

When I took it to tire discounters I told them to use the "granny" specs on the Skosh chart lol What's sector-shaft adjustment? Also I have air shocks installed in the rear, could that throw it off as well if its not the same psi as when I had the alignment?

Don't know what the "granny" specs are, ?

As far as the air shocks, the only thing to keep in mind is, the higher you lift the back of the car, the more your taking away from +caster.

Sector shaft adjustment, on the top of your steering gear box, there is a large nut with a slotted bolt in the center of it. By loosening the nut, and adjusting the bolt you can take slop out of the box. (slop you feel in the center of your steering wheel when driving).