Time limit and blocking not working

I have Norton Online Family installed on my son's PC where he is a restricted user, but it doesn't seem work properly.

1. I set time limit. When it counts down at last 60 seconds, he can repeatedly click yes to stay on.

2. I have facebook.com in blocking sites, but he can still get on that site.

3. He can have it disabled.

 

NOF seems to leave holes in protection. What can I do to get it fixed? Thanks.