Am I expecting too much? Haven’t paid much attention to other cars on lifts but do they normally lift level?

Same as above.How do we know the camera was level?
Yes, you need to pick up on surfaces that are level side to side and if they are not level front to back then you adjust the feet (that's why they are threaded) until you have the same distance between the lift pad and the lift point of the car front to back.Could it be that it’s just pushed to far to the right thus loading those arms more?
I didn’t notice a significant different in tension of the cables and that is the car sitting on the locks.
Do people typically pick up on the pinch welds? I didn’t but I’ve read some people do that