User blog comment:Dopp/Technical Update: November 15, 2011/@comment-3503787-20111116091914/@comment--20111116142514

This actually makes sense to me. The timestamp, once submitted, isn't going to update until the page is reloaded again. So every comment you add adds the correct "1 second ago" timestamp, but none of the others are gong to be updated.

Though this is still not ideal admittedly. I'll pass this on.