It could be the 3 leveling screws are all 3 just too loose. This is a little tricky. The 3 screws just need to be in sync with each other along each of their screws. There is a spring that keeps the tension between the plate the head of the screws. There could be too much screw between the head and plate.

When leveling, the program asks you tighten the screws 4 turns. That tightens up the springs.