Yeah, I downvoted a post and now it's showing up on my profile as a boost. I'm not sure whether a bug occurred or if my finger slipped and I did accidentally boost it, but either way I'd appreciate having a way to unboost it 🙁
(Update: This has now happened with a comment I downvoted too, so I'm thinking bug. Retracting the downvote didn't unboost either post, either!)