My friend didn't get his campaign completion achievements?!

[SuPeR MiKe]

My friend finished the campaign today on hardcore, but the achievements for completing the campaign on normal/hardcore didn't unlock. Are Epic aware that there's a glitch with these achievements. Also, is it rare? Question for Epic, can this be fixed somehow?

[MightyPeter]

Go to chapter select and see if he has all the acts and chapters "ticked".

[AHal]

Tell him to scroll through each Act and Chapter selection tile and make sure every one has the little emblem on it. Likely he joined somebody's game and missed one - the prologue is what most people miss.