On the main site, the suggested-edit review page shows that I have reviewed 104 suggested edits. When I'd reviewed 100, I should have gotten the Proofreader badge. I don't have that badge. What gives?
Note that the same question's been asked about Stack Overflow. However, the accepted (and only) answer there is that there were fewer than 100 true suggested edits reviewed and the balance were audits — and (unlike on Stack Overflow) there are no audits on Mi Yodeya.