Forum:Welcome Message from unknown user

hello community, i'm new in wikia forum so i hope i'm doing this right. I'm one of the admin in Tiny Village Wikia. i have a question. Why is there a welcome message from unknown user named "Jasonr". as u can see in thread 15269. i already did some modification in 4 welcome page. but as far as i can see nothing wrong in it, and i can't undo it because it's the first edit.
 * MediaWiki:Welcome-message-anon
 * MediaWiki:Welcome-message-user
 * MediaWiki:Welcome-message-wall-anon
 * MediaWiki:Welcome-message-wall-user

the wikia's walls is enabled. by WieQuadrat (talk) 16:41, August 3, 2012 (UTC)

the problem still exist. can't someone help or at least give explanation. by WieQuadrat (talk) 14:31, August 19, 2012 (UTC)