hmm maybe write letter to admin from game post (Threepwood or Lososerg) and explain the situation (take screen shot of link stats) just in case the fight link dissapears. and make request for reset of instance for those who did not get rep/loot ? I can't say whether or not admins would do that. But I think in this case its the only logical option if the game glitched and messed up your groups instance
Also Admins are out until Monday so that would be the earliest they will be able to do anything.
Hope this info helps good luck!.