In your num and nav layers you have to change the codes of the opposite layer tap keys. So in your num layer change MO(nav) to MO(chez) and for your num layer change MO(num) to MO(chez). So once you are in either layer hitting to other tap key takes you to your chez layer.
I stumbled upon your dactyl PCBs the other day and thought they were a pretty neat idea. What are the intended LEDs for per key RGB? SK6812 Mini-e with the small legs?