Xenode's old posts keep showing up as new in Planet Fedora

I've noticed that whenever Xenode (FAS username jmlevick) adds a new post to Planet Fedora, many (all?) of their old posts show up immediately after their latest post, filling up 3/4 of Planet Fedora's main page. I'm not sure if this is the right place to report this, but is there any way to fix this (or, if it's user misconfiguration, to block this user until they fix it)? Thanks, Jonathan