Hellbanned users' comments are only visible to themselves and users who enable showdead, so they disappear when you clear your cookies or logout. You aren't, by

Hellbanned users' comments are only visible to themselves and users who enable showdead, so they disappear when you clear your cookies or logout. You aren't, by the way. Blogspot just didn't send a redirect to canonicalize the slightly differing URLs, so HN doesn't know they're really the same posting.