Sorry, missed that bit.
How are the rear bushes? As mentioned your car is being pushed so any movement from the rear will cause issues.
Another thing and it sounds crazy but have you tried different Tyre places?
Diffrent places, different techniques and some have reported of vast differences with mechanics in the same town..
It can be a pain mate. Hang in there, we'll get ya rolling straight..
If you can maybe worth going over all bolts yourself as New things take time to seat and sometimes will shrink or move.
Did you have issues before fitting adjustable panhard rods?.