We've detached this subthread from its original parent (https://news.ycombinator.com/item?id=10023994) and marked it off-topic. You're welcome to repost the on-topic part if you want to.
Except it was decisively upvoted, not downvoted, in the end. It's pointless to ask why there was a bit of downage in the vote stream. Maybe someone misclicked. Maybe someone was mistaken. Most of these cases sort themselves out rather quickly; meanwhile a comment about it sticks around inaccurately forever.