Beyond that, we'd need to know what post you're talking about. If you'd like to provide a link, we can look into it.
I'd love to hear a non-malicious explanation for that.
In the future, please do what the HN guidelines ask and email such questions to us at hn@ycombinator.com. I only saw this thread by accident.
Lots of software affects both story and comment rankings. "Poison" is a rather tendentious way to describe that. HN's goal is high quality in all things, to the extent it's possible. That doesn't just happen by default; systems are necessary, and it gets harder as numbers grow.
