fixture builder 16bit problem

Hi.

I'm trying to build a fixture using fixture builder and got stuck at a problem.
The fixture are using multiple 16bit channels and some of them when i control them have bigger steps between them. Some have 1 step and others 512 steps.

they are all build with the same DMX value (0>65535) and the real world at the same (0>65535)

channel 8/9 & 10/11 works perfectly with 512 steps
channel 23/24 25/26 27/28 29/30 works but only with 1step

why are they behaving differently?

// M.Halen