[xbox] went from bugged/locked Hyperius to unlimited/no lock out

like many i got the lock out bug the other day, read how to fix it and figured would try it on my gunzerker.
unplugged network cable changed system clock to 1-1-2013
started up game killed him, save/quit advanced day a head killed him again, save/quit advanced day a head, started fight
hit big x button to pause fight, plugged cable back in
waited a bit, clicked on connect to xbox live
went back into game, killed him
thought i was done and accidental shot him and got killed lol
ran back to him, killed him again, ran out of the arena to despawn his robots, and when i went back in was able to kill him again
repeat a few dozen times. i have died a couple of times, can not reenter arena, have to zone out (keeps stuff on ground) or restart