Calibration problem with Inc

[ok2dl]

Hello.
Thank you for an excellent project.
I built a Rotator with an arduino mega and a VK4GHZ Nextion display.
When I use, for example, a potentiometer as the azimuth source, the correction is OK.
I enter in the terminal
\A20 on the display I see an azimuth of 20°.

If I use incremental as the azimuth source and enter \A20 on the display, I see an azimuth of 40°. When I enter any number the result is always double.
This problem is also present when FEATURE_MOON_PUSHBUTTON_AZ_EL_CALIBRATION is used.

73 Marek OK2DL