I'm a moderator here. It looks like we banned your account early on because you posted something that broke the site guidelines. We have to be strict about this when accounts don't have much history because HN gets a ton of troll accounts.

Unfortunately, this also means we have to make guesses when there isn't much information to go on, and that leads to false positives. Your account looks like one of those, since it went on to participate on HN in a good way. I'm sorry about that—we always correct these situations when we see them, but sometimes it takes time before we see them.

I've unbanned the account now, so everything should be fixed. If you need anything else, email us at hn@ycombinator.com.