Ok, so i had made an account for my friend since he didnt have one, and i let him play while i slept over night. So i decide to get back on and play halo reach and my weakly challenge had reset! Does this mean i lost the credits for doing it? And can any one explain to me what happened????
Also it was the same challenge from the day before that i had completed, it just says that i didnt do it. so do i do it again?