Fact of the matter is you cheated because its impossible to finish the dung with 2 people doesn't matter if you go in with 6 people then quit on 4 of them out of dung or log off etc.. and finish the dung with 2. Its called Glitch and that's a form of cheat got it? Dose't matter how you did it game bug hack whatever the dung is impossible to be finished with 2 people...
Or simply glitch 4 more people inside the dung without record...