The "multiple Nick syndrome" seems to stem from the game allowing me to join a game with short packets, because AFAIK it only occurs when I get that message and join the game.
Where is the server? I saw it a minute ago with four people and was about to join but it seems to have disappeared. 
Everyone left all of a sudden, so I left as well.  I'll start a game now (if there isn't one already), and use my 
actual ip adress this time.  (Yeah, you were right, 
www.whatismyip.com gave me a different number.)  It's 71.126.129.146
Port should be the same.
Yeah, but this time I was one of the nicks...
And now there's a nick player profile when i start the gmae  
 
Trackers eem to be back up, h've hosted a game, someone try joining.
1:  Yeah, Ulala was a Nick in an earlier game.
2:  WTF?
3:  Yeah, I'll join in (if not then I'll host that game I said I would for a little while)