Accelerometer Issue

Hi I have the CX-20 Opensource quad, updated to the latest available firmware version for this hardware. I keep trying to do the Accelerometer calibration but it is always off center after completing, attached is an image, no matter how many times I recalibrate it always comes out the same.

I have tried different services to make sure the table is off and they always come out with the same tilt when sitting level after calibration.

Any ideas?