For some reason, Blizzard opted to disable achievements on launch day (or their achievement system broke). I said screw it, and powered through the campaign anyway. I hit level 70 while achievements were disabled, and now when I go back and replay the mission where I hit 70 in the archives, the achievement for hitting 70 won't unlock. Ditto for the achievement for doing all the evolution missions, and a couple others.
Is there some way I can get these through the archives? Can I get them if I restart the campaign entirely? Or is this like some of the achievements that you could get early in Diablo 3 where you just had to wait a couple weeks for Blizzard to get their sh*t together? Achievements are definitely working now, per a community manager.