Feel free to deduct another point or two. That seems to be the case with my comments recently. Welcome to an open discussion on HN ( ...and here's anothecpoint gone for criticism).
1) you can still edit the original to add this remark if you really want to, although it's frowned upon
2) initial downvotes mean nothing, I've had comments go to -10 before jumping back up to +30 few hours later. Why would you complain about it within 3 minutes of posting is beyond me.