Unable to visit website which appears in Allowed list

Hi.  We installed OnlineFamily yesterday and created an account for our son.  When he tried to log onto a couple of sites they had been blocked as they were linked to specific categories News and Shopping.  We 'allowed' the sites under Settings - Web - Specific Sites to Allow.  These previously blocked sites are now shown in black on the Activity list.

My son logged on and did 'Update House Rules' however the sites are still blocked.

 

We're using I.E v 7 and Windows XP.

 

Thanks.