Fibaro Roller Shutter 2 calibration problems

Hi guys.

I have the Roller Shutter 2 from Fibaro. The calibration does not work any more because the Fibaro does not realize that the roller shutter is already in the highest position and does not stop going up.

Anyone knows how to fix this?

Can i set position 0 and 100 manually?

Same question here. Any answers?