Hey guys fox here, so I’ve came across a little problem today. So I hit level 145 couple days ago and got bored of grinding and what not so I said hey I’m going to go for all the achievements. The problem is after the 4th mission I stopped getting the achievements… It littleraly says for mission 5 and 6th they’re completed on legendary but I was not rewarded the achievement. I figured I’d try the little side mission achievements and I completed evacuation without dying 3 times under 18 minutes just to keep trying for these achievements! Also with the Preying Mantis achievement. Finished the leve. l with both in mint condition on coop and no achievement rewarded… Even been following some guides to make sure I’m not messing up!? Which I’m not because I’m an avid halo player who knows what he’s doing. So if there are any 343 employees that read this or anyone with any sort of knowledge please let me know!! Ya boy needs help! Thanks 
No one?
For the “Flag Monger” achievement, it says “100%”, but I don’t actually have the achievement…