Bugginess of Halo 4 campaign and challenges

Hey 343, Halo 4 has been a great game so far but there are a few things that are just really getting on my nerves about it. First off I jut completed the challenges “The toughest of Luck” and “That’s No Moon!” but for some reason it just decided not to give me them as completed. I spent a good hour and a half fighting through that level and then I reach the cut seine for the next level and I didn’t get the challenges, and this isn’t the first time campaign didn’t credit me for completing missions. I would really appreciate if you could fix this because I really don’t feel like it or have the time to redo that mission again because it didn’t credit me for it… Thanks.

Im having the same issues with getting the Mark V helmet. I beat the game on legendary but I dont have the helmet, this is extremely frustrating.

i beat the game on legendary solo and it didnt give me any achievements at all!! or the master chief armor for multiplayer! it also reset everything saying i never beat any of the campaign missions but yet on my service record it says i beat it on legendary…