[AtomicLabMonkey]

When you have a shop do corner weights on your car, keep an eye on them and make sure they're doing it correctly. The car must be rolled off the scales several feet and then rolled back on after each spring perch adjustment. If they don't, the readings can be incorrect. The car should also be sitting in its race condition - driver inside, fuel level where you want it, spare tire removed, or whatever else you do to prep it.

Ideally you would also do corner weights before the alignment, because all the spring perch adjustment changes the corner ride heights, and can affect the alignment.