The problem with the disappearing ignored user lines is occurring again tonight. I just cleared cache and rebooted the PC to be sure it wasn't something stuck in my temp files and it is still happening as described in the referenced post.
3 or 4 posts were stuck at the top... so the time frame started with aidans post at 10.44am working backwards when I posted to your "picture" post... then the "new posts" were listed below the stuck ones.