Does anyone have any clue why joining one server force joins another

[Envyx]

both Pve and Pvp servers are up. but when you try to join the PVP server you get directed to the PVE servers. its as if the ports are being overridden some how.
We tried changing the original ports of the first server to different ports, but no matter what it was changed to, it kept changing itself back to the 7777, 27015
It wasn't changing the bat file, but kept using those ports instead.

[Eps]

Yep, it doesn't seem to honor ports in launch arguments or in GameUserSettings.ini.

I have multiple physical hosts behind the same router and they like to step on each other by advertising as using port 7777 (and +1 for each additional instance on a single host). 

Haven't got a solution to this yet.