Alt and bearing incrementation change when mapping switch on Warthog

hey !
Each time i try to map a switch on my warthog throttle the heading knob goes from 1°to 10° and the alt knob from 100 ft to 1000 ft.

As an exemple if i map the landing light on button 25 ( 2way stich) the light will turn on/off but when the switch is in the upper position all the knob goes to ° or 100 ft.

Any workaround ?

Ps: sorry for my poor english !