Multiplayer Problem (XP)

I have a big problem with halo 4 multiplayer: I don’t get the exp from challenges, commendations and oni archive (unlocking stuff by entering codes). Game stats say that I have completed the challenges, and also in the classified section I can read that i should have unlocked the exp, but I don’t earn it.
Do you also have this problem? how can I solve?

p.s Not so important but my spartan’s armor in game stats is a default red one…

ive noticed that as well. not getting EXP for completing challenges. i thought i just didnt notice it when it didnt happen. and my states picture is default red too.