Achievements Not Unlocking-Master Chief Collection

Just finished playing Halo 4 Solo on Legendary and didn’t get any of the achievements. What the hell is MCC’s problem?

Check your service record here for each mission sometimes very rarely it won’t register you beat that mission I had the same problem had to replay a few halo 4 missions

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> Check your service record here for each mission sometimes very rarely it won’t register you beat that mission I had the same problem had to replay a few halo 4 missions

My service record says I completed all the Halo 4 missions on legendary Solo but the achievement is still locked at 75% complete.

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> > 2533274920453574;2:
> > Check your service record here for each mission sometimes very rarely it won’t register you beat that mission I had the same problem had to replay a few halo 4 missions
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> My service record says I completed all the Halo 4 missions on legendary Solo but the achievement is still locked at 75% complete.

Mine says the same thing… I replayed Shutdown on Legendary and it still says I haven’t completed it… So frustrating!

I’ve just finished the last Spartan Ops mission solo on legendary. So far i’ve got every achievement for completing the chapters, also the achievement for chapter 10. However i didn’t get the achievements Feet First, Term of Enlistment, Hazard Pay, Icarus and Smooth Operator. According to the achievement app i’m at 98% - which means one mission is missing (for each difficulty)… This is obviously a bug. I can see in the mission overview that I’ve played every mission on legendary.
Is there any way to unlock the achievements, or at least find out which mission didn’t count? I don’t wanna play everything again…