I felt like I explained that: that was a phenomenon that I noticed, and I'm not even 100% sure that was happening, as I have no way of verifying. I also don't invite my twitter followers to upvote anything; I simply tweet a link to all my blog posts when I post them. I don't tweet links to my posts on HN.
Now I wait a couple of hours just to make sure that that's not going to make the difference. I highly doubt people would submit those links anyway, but on the off chance that they would, I'd hate getting people banned or their votes discarded because they appeared like a voting ring.
