Fizzy

We have Youtube education working well with our DansGuardian and IPcop setup. However we have noticed that students can access Youtube user pages if they know the username for another youtube account example "youtube.com/user/bluexephos" This shows the youtube users main page/background and plays the current video even with the education block on. Links to other videos and playlists from this user are blocked. Does anyone else see this? Any Ideas how I could solve it or would i need to contact youtube regarding it.