Https:// version of sites being allowed

I have facebook.com specifically blocked, as well as the social media category.

In both IE 10 and Chrome on Windows Vista machine:

http://www.facebook.com is blocked

https://www.facebook.com works

How do I block the https:// version of the website?? The activity tracker in my online account is only showing websites visited with http and not https (so I cannot even see that the parental controls are being circumvented)