How to setup so one program is whole keyboard and other is split?

Keylab Mk 3 - been trying to set this ups for a while and having no success.

User 1 whole keyboard - User 2 split keyboard

Seems no matter what settings I try on the keyboard or in the MCC, it doesn’t “stick” and it continues to transmit on only one channel.

I have channel 1 set to the left split and channel 2 to the right (well at least that is what I am entering but when I choose either User 1 or 2 it always only transmits on one channel.

Possibly as these settings are only available in Global perhaps? I cannot find a way to set IN the actual User program separately to other User programs.

Is there a tutorial on this somewhere?