
Exiting out and entering back in will not do anything as you will keep coming back in as an observer. To fix this your opponent will need to kick out both of your instances. You cannot use the /kick command in this instance as you are an observer. Only participants can use this command. Kicking is accomplished by using the kick command: "/kick #" (no quotes, with the # replaced by the player number. For the above example Arrow would have to issue two commands:
/kick 1
/kick 2
This will resolve the issue. If it does not then seek assistance from an Admin or Moderator. If none are available you can ask in Main Channel to see if anyone can help you out (you may have typed a command incorrectly, for example). And if nothing works you will have to Cancel the game.