Earned Steward badge twice for the same queue

Just like the title suggests: I was just awarded the Steward badge for Close Votes & Low Quality Posts, although I already got them like 6 months ago. My guess is this is a bug, as they are meant to be awarded once for each queue.

• That's nothing. Today, I earned all 6 steward badges. $\ddot\smile$ – José Carlos Santos Jan 29 at 18:48
• A large number of users just re-earned some of their Steward badges: math.stackexchange.com/help/badges/228. – Eric Wofsey Jan 29 at 18:48
• @JoséCarlosSantos You currently have 99 Steward badges, that’s incredible! – Calvin Khor Jan 30 at 3:43