Achievements not unlocking Halo 2

Played Halo 2 all the way through on Legendary, found all skulls and terminals, however, I did not receive the achievements for collecting everything and completing the game. When I went to my achievements for Halo 2 it displays that I am at 92% or 80% completion of those achievements. Is this another bug? Is anyone else experiencing this same problem?

Also match making is skill screwed up.

Since update unable to get skulls to appear on legendary Halo 2 Cairo Station and beyond - and yes playing on Legendary - every new update creating new glitches.

I haven’t got the achievement for completing “The Oracle” (I beat it on Heroic 2 weeks ago). I haven’t even got a nameplate for beating the campaign on Normal (I did all but 2 of the missions on heroic).

I’ve had two stubborn achievements that haven’t popped for me in just under a month. I’ve unlocked them, they show up saying “Done! Unlocking…” and show up with the score, but don’t actually show that I’ve unlocked the achievement. Any thoughts??

I have been having similar trouble. I progressed through halo 2 on legendary solo and found a few skulls here and there and terminals, but about halfway through i stopped getting level achievements. I have skulls and terminals on some of the last few levels on legendary and all levels say completed, but still no achievements for levels or beating game on solo legendary. Plus, pretty sure i’ve killed more than 600 people in the campaign. I don’t even get the “Done! Unlocking” thing either.
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