Forum:Made a mistake in the armory

Okay, so here's the problem, I went into the armory, well glitched is more accurate, and i was running along, then I noticed that the box tied to "Steal Loot" was checked, I though oh thats cool, I wonder how it knows i'm down here. Then, when I exited to the menu and started to the armory again, a blast door had shut. So, does anyone know if I can go with another person ON THEIR GAME and complete the same mission, "Super-Marcus Sweep" and the door will be open on my account? Sounds logical to me. And would anyone be willing to help me on said adventure?