I'm working to get this situated with TCAdmin and installed your config as you mentioned, however I'm only able to run one server at a time.
I realize that the Custom Port is the instance number (0-> 14 I believe are your options), and by choosing the instance, it adjusts the port (7777, 7778, etc.). Currently all my servers that have been installed, are all using instance 0. Is there a way to have it detect other instances and automatically adjust this accordingly? I imagine since you have "Convert.ToInt32(%serverport%) - 7777" entered into Custom Port 1, it was supposed to do this, but it doesn't appear to be working.
Also, on a side note. Does MNC only use the machines primary IP? TCAdmin has allocated non-primary IP's to all instances of MNC, however when looking at the console I'm seeing
Log: PublishSteamServer::HostAddress IP is %Primary IP%:7777.
I imagine since your last comment on Feb 24 regarding some command line adjustments were needed to be done, that you've still yet to make these adjustments and these issues I'm seeing are a result of that?