Lobby stuck at "0" when game starts [Solved]

Yesterday I set up 3x MNC server instances without any complications. I could join them and play without any problems.

I try to play today and they're all stuck in the lobby. It does the countdown to starting the game and then gets stuck at 0, and everyone leaves after getting bored of waiting.

Jjust to make sure I stopped the servers and ran the updater again. Brought them back up, same problem.

They are also only showing intermittently in the server browser, either in steam or in-game.

Is anyone else having similar issues?

Edit: Command line arguments

Code:

server HostileLobby?game=HostileGame.HGameInfo_PreGameLobby?bAllowJuicePurch=True?bAllowBotPurch=True?bAllowHazards=True?bAllowMascot=True?bAllowCustomClass=True?bAllowChangeClass=True?bForceRndClass=False?bIsLanMatch=False?bIsDedicated=True?bAllowTeamSelect=True?bAutoBalance=True?MatchDuration=2?OTDuration=2?ClassLimitAssault=4?ClassLimitTank=4?ClassLimitSupport=4?ClassLimitAssassin=4?ClassLimitGunner=4?ClassLimitSniper=4?MaxStarRating=4?MinNumToStart=1?ServerDescription="PhonicUK.com #1 - 24/7 100Mbit Dedi - Standard" -ServerInstance=1 -log=DedicatedServer.log -STEAM_DEDSERVER -seekfreeloadingserver -nohomedir

All 3 are the same except for the ServerDescription and ServerInstance

Edit:

This turned out to be because all 3 instances were trying to use the same port for the web admin. If you do this, the servers will still start without errors - but the game will not run.

Holy crap, it's PhonicUK of MCMyAdmin fame! Best Minecraft server tool in existence, IMO.

I really hope you're going to do something for MNC servers.