My children's web sites are not listing when I go to Manage Activity>Web>Category "All"

I can only see a list of the sites that caused Norton Family to block the child from viewing the site.
The time period in the drop down menu does not matter. How do I see what sites they are visiting?

 

The children use a Windows 7 Professional desktop PC and IE 10. Each child has his/her own account and is not an administrator on the PC.