Me and a friend completed the campaign on legendary. For some reason we never got the in-game credit or achievements for completing missions 4,6, and 8. However, on my Halo 4 stats it comes up as having every mission completed on legendary.
Same thing happened to me.
We just turned off the 360 turned it on and re-did the missing missions.
It was completed after re-doing the mission.
I never got the achievement or completion in game for level 3, but Waypoint shows correctly, that I’ve completed it solo legendary twice. Ridiculous.
Other people are having this problem too? Will this get fixed?