[detst]

If it was auto-killed, it's for something you did in the past. It will only be visible to users that are logged in with "showdead" enabled and you (presumably to make spammers and trolls think their comments are visible). But I can see this comment so maybe someone didn't like the other one and flagged it.

[dangrossman]

It's not for something he did in the past or this comment you're replying to would be dead as well. He's not hellbanned. It was probably just a duplicate form submission. When you double submit the comment form, the second copy of the comment is automatically killed, but on the poster's screen it looks like both comments are there. You delete the first one instead of the second, and you end up in this situation, with one [dead] copy of your comment.

@xSwag, I wanted to let you know about the [dead] comment directly, but couldn't find a way to contact you here or anywhere else you might use the same username. There's no e-mail/twitter/etc in your profile.

[xSwag]

I was using nightly firefox build so that is probably why it submitted twice. I have updated my profile with my e-mail now. Thanks!