Norton DNS does not block pornography or family unsuitable sites

Good evening and a happy new year!

 

I use Windows 7 with default Windows Firewall. 

 

Windows ipconfig/all lists Level 3 Norton DNS IPs and DNSBench also correctly displays Norton DNS IPs as the current setting. Please see the attachments for the screenshots.

 

With that I was wondering why these two sites: 1)www(dot)playboy(dot)com and 2)www(dot)penthouse(dot)com are not being blocked?  Please help.

 

Thank your very much for your time.

 

Screenshots:

 

ipconfig/all

DNSBench

 

 

[Edit: Removing hyperlinks to conform with the Participation Guidelines and Terms of Service]