VTOL Mixer group #1 saturates at 50%, Why?

Hello. Iā€™m setting up a mixer for a VTOL tilt-rotor.
I have been using control group 0 and 1 (because I find that in FW mode control group 0 is inhibited).
I find that control group 1 seems to only work until 50% stick deflection while control group 0 is effective to full stick deflection.

For example if you had the following mixer lines
S: 0 0 -2500 -2500 0 -10000 10000
S: 1 0 2500 2500 0 -10000 10000
One would not exactly cancel the other. (iā€™m interested in canceling out some control in VTOL mode).

Is this intentional? Is there any way to double my stick resolution on control group 1?

This seems to be a convergence VTOL problem. When I tried another aircraft I had no saturation.

Ok, This was a matter of the parameters being high enough to saturate the servos. When tuned down, the null zones at the top and bottom of the scales were reduced.