alignment woes ..offset bushings

You are experiencing tecs not willing to follow or read directions.
First one must set correct suspension ride height following factory method. If this step is passed over, or done as an afterthought after setting camber, castor the alignment will never be right. You can’t align these casr if one side is higher than the other.

I set the ride height before dropping car off for an alignment, and then I check it after it comes off of rack to see if the tec jacked things around.

Lastly these guys, particularly big box joints, don’t understand that bias ply castor setting don’t work with radial tires and generally won’t dial in need additional positive castor, and blindly turn wrenches until a green number pops up on their screen for year of car. Or their company has a policy to set only year, make, and model stock settings; get it into the green, and get it out the door.

Lastly I don’t think most of these places test drive the car before it is returned to owner.