1. Those readings should be fine.
2. They should be able to lift the corner they are adjusting while still on the alignment rack. They will need to estimate how much to adjust, make the adjustment, then lower that corner and check the readings. There is no need to get the springs to settle between lifting and adjusting. Some alignment techs would bounce the car up and down on the rack before making the final readings, but I've been taught that it isn't necessary.
