Not sure if it's a bug or not. "Migration, Surprise or Heads Up to users?" thread was originally started in "XenForo Discussions & Questions" forum and later moved to "Off Topic". After several replies the thread was displayed as the latest for the two forums on the forumhome. In the first one, the thread starter was displayed as the latest poster when in reality it was a different user. By the way, this thread wasn't the one with the latest post in "XenForo Discussions & Questions". It was a different thread.