Blocked Sites not working on Android

Hi, I'm running ICS on my tablet.

 

According to onlinefamily,norton.com I have successfully blocked commons.wikimedia.org

I have refreshed settings several times over the past few weeks, but my son keeps on accessing it.

Does this not work for subdomains? It's not being marked as a blocked site when he accesses it, but it's listed under sites I have blocked (and those usually work). Do I need to block wikimedia.org?

 

Also, he keeps on going through pictures on a blocked site. How is this possible? He's blocked at every stage, but he keeps on licking links to get to the new one. Is he just faster than the block?

 

Please help! These are things I don't need him looking at. Thanks :)