@Mr Sat:
I have the same problem and my solution is:
I have not created multiple equal networks, I've created several equal muxes for the affected muxes on the same network and have assigned the affected services to a single mux. It's a little work, but it works. See the pictures for better understanding. I hid the unneccessary columns.
I hope it helps you too...
@John Deer:
Silence, if you have no constructive answer or help. Selfsat isn't a crappy china hardware, it's manufactured in Korea and it works like a charm. And they were the first and are the only one who build a SAT>IP-antenna without any coax-cable.