Halo 3: Not Saving After Completing the Game

Games Halo: The Master Chief Collection
1

I just finished playing Halo 3 (normal) and the game never updated that missions 10 and 11 were completed after completing the game. It still shows that 9/11 missions were completed in lieu of 11/11 like it should.

Any work around or just another bug?

Thanks.

2

Same issue finished Halo 3 on Normal got the Achievments but when at the menu states 9/11 completed.
Please fix.

3

I have had the same issue with Halo 2…except I did unlock the Lone Wolf Legend achievement but not the Legend achievement. So i have the credit for the campaigns but not by 343 which is all that matters