I've gotten most of the different achievements from the Kerrigan sub-group of the Heart of the Swarm campaign achievements, the ones for using the various abilities Kerrigan gets. But some of the ones I haven't gotten are for some of the first achievements you get.
At first I couldn't figure out why, then I looked at the achievements, recorded their progress, used the associated abilities a lot in a mission, then checked them again. No change. So I tried swapping to some other abilities for a mission or two then swapping back. Nothing. I finished the campaign and tried using them in the Master Archives. No progress. I gave up and restarted the campaign from the beginning. Still no progress.
Is there anything else I can try? Has Blizzard said anything about this issue?
Edit: Oops, forgot to mention the specific achievements. The ones that won't update for me are Smoking Corpses, Get a Grip, and So Many Banelings!