Halo 4 Campaign Completed, got reset

Hello forum!
I have a weird experience with Halo 4 :0
I completed the Campaign on Normal solo and Co-op Legendary, found all the terminals too, but now my campaign got reset T_T , along with all of my terminals I found…

Anyone have a clue as to what happened?

Message my Waypoint account or my Xbox Live Account

My GT: NerfNinjaZ

Thanks!