Connect 2 MCA-C5s using RIO integration

Hi, I’ve 2 MCA-C5s which work independently using HA RIO integration with no issues.

I want to share the sources from controller #1(master) to all the zones available across two controllers. I have connected controllers using RNET connection with different ids. HA RIO integration is able to pull both controllers zones with no issues - I can turn zones on-off just fine. However, sources for the controller #2 does seem to be getting created on random. I see correct sources for controller #1, however, sources for #2 does not match what i see in SCS app for two controller setup.

I have tried to duplicate SCS config for both controllers but still sources from controller #1 are not assignable to zones in from controller #2 in HA.

Is there some configuration which i missed in the setup or is this setup not supported by integration?

Thanks