Campaign completion achievements

Just finished campaign on heroic difficulty while co-op(every mission) and sitting with legacy, heroes rise, AND all for one achievements still locked. They all say 93% complete but if I go into my co-op campaign list, every mission says completed on heroic.

Whats the deal???

Hopefully someone knowledgeable sees this and contacts you in regards to it. This happened to me on MCC and was never taken care of.

Can support at least provide me with the details of the one mission that isn’t registering? I don’t know how we can see it as users.

im the most sarcastic way possible… Thanks for all the support here! Buy every halo game ever made and can’t even get a RESPONSE from support for one question. Losing a customer here.