say I have only completed four campaign missions on Legendary, when in fact I have completed the whole campaign on Legendary and unlocked the ‘Lone Wolf Legend’ achievement?
And when will this be fixed/how do I rectify it?
Its broken yes you need to do the levels over again so it registers.
If you did the levels when your box was offline then it doesnt show up. I looked and levels 5 threw to 8 need to be beat online to show that