Several achievements in TMCC bugged?

So i Just beat the Halo 4 on normal. I have beaten the whole 1-4 on normal, But yet none of the achievements for 4 or beating all games on normal or easy r popping for me. Just tested out few others, and those work fine. I can prove i have beaten all on normal. Halo 3 is all legendary, But i know that go towards the others. Please Help