You didn't explain why you unvoted Acohrs, so I'm going to shoot out some hypotheses and you can hit them down or let them up. Were you not entirely sure about your read direction, kind of unsure as time went by, or as Kalor mentioned, was it a reaction towards getting heat (vote/attention) on you?
Usually, when someone unvotes as a reaction to town pressure or a vote on them, I'm more likely to believe their initial vote was just fluffed up activity to seem town and not a vote with much thought behind it. Here, I'm okay with giving the benefit of doubt since they're new, but for others, not so much.