I've noticed a little weirdness in the front page comments system lately, but nothing like what you've just described. Also, your second link appears to be a screenshot of a forum posting, not the front page?
For what it's worth, here's what I've been seeing in some of the comments threads: Sometimes when I post a comment, it won't be there. If I hit refresh, sometimes it shows up... sometimes not. If I wait a few minutes, then it'll be there. Edits also behave oddly sometimes. If I edit an existing comment, the edit will randomly appear/disappear several times over the next few minutes, before finally settling down.
Nostalgia isn't what it used to be.