The Boy suggested I try loading up my blog stats in a different browser - and it worked! (He is a genius! I think I'll keep him.)
I can see now that "A Very Important Announcement" got more views than any other post, probably because of its eye-catching title. Which is funny because the "important announcement" was that if I stick my tongue out really really far, I can see it in my peripheral vision. It's possible that other people wouldn't actually consider this "important" per se.
In future I shall be careful not to abuse grandiose post titles. I don't want my audience to get all excited for Big News, only to find a post about root beer or my cat's kibble farts.