IP Address being blocked

Hi -

I'm still having this issue where IP addresses that are for valid (permitted) sites get blocked.  For example:

4/6/12 8:55 AM : Child warned for site category block & did not proceed: http://173.194.73.103[Uncategorized]

 
4/6/12 8:55 AM : Child warned for site category block & did not proceed: http://69.63.190.74[Social Networking]
 
The first IP address is for Google, the second for Facebook.  Social networking category is blocked but Facebook is allowed.  I believe that there are links within some pages that have IP addresses rather than a fully qualified DNS name as the address.  I thought you would do  a reverse DNS lookup to validate the the IP was okay.  This doesn't appear to be happening.
 
With this issue, the computer is almost unusable.  This is my kids computer and honestly when I tried to use it to help with their homework it was so frustrating I just used my own computer.  Unless these issues can be resolved, I will have to find some other product.
 
Thanks for you help,
wdk40