Armor/Campaign reset? Answers?

I was just playing reach earlier this morning, just playing firefight on 04 to see how long i could keep ODST’s alive, you know- things like that.

And i just got on again and my campaign was reset along with my armor, emblem, ST- but not my rank. and i was awarded 5,000cR for ‘joining noble team’ which i feel dirty getting, because- well. I’ve already gotten it before. Years ago.

Does anyone know why this happened? Do I gotta play the campaign again to get all the missions back?