Post patch still having the occasional problem where I need to complete a campaign mission several times to get credit for them. See service record:
I have completed Forerunner on Halo 4, got the achievement, service record shows it is incomplete. I will have to redo this one eventually to get “complete all levels in X on X difficulty” achievements.
I have completed Reclaimer on Halo 4 as well, no achievement, no service record, ingame did not recognize it. Have to redo the entire level because checkpoints are wiped after completion.