LOTV Campaign Achievement bug

Hi there, I am having an issue with my LOTV campaign, specifically the purification mission achievements, I have completed the achievements as the mission requires even acquiring the 10 achievement points for the mission. However when I go to my bonus objectives in the campaign it tells me that I still need to finish the missions thereby preventing me from finishing said part of the achievements sticking me at 90/120. I have tried going back and completing the mission with the requirements again hoping the issue would resolve itself without luck, any help would be greatly appreciated.

Hi there, it would be advisable to NAME the specific missions & achievements in question.

Information you’re giving now is quite vague, however I am getting a bit of impression as if this yet another case where someone tries to get one of those “Bonus Objectives” achievements by unlocking other achievements, when actually one must complete every bonus objective within the particular mission cluster.