It seems that two days ago, I was awarded the "Steward" badge for the "First Post" and "Close Votes" queues, although I received them in May and July of last year already. Might this be a bug in the algorithm?
Or is it a change of policy? The "tooltip stats box" in the review queues state "These badges can only be earned once", although I noticed that the help-center text (now?) says
Complete at least 1,000 review tasks. This badge is awarded multiple times per review type. This badge can be awarded multiple times.
If it is indeed a policy change, it might be helpful to omit the "at least" from the sentence "Complete at least 1,000 review tasks.", as that may seem to contradict the "awarded multiple times per review queue" statement.