Do you see the Norton Safety Minder icon, a dog paw in the system tray active (not disabled)?
Do you see the child's profile online is protected (in green)?
Please also make sure the child doesn’t log onto the PC using a account that is not being monitored.
To avoid and limit the possibility to tamper/disable the system, please give non-administrative rights (limited or restricted) to your child’s user account.
Norton Online Family is active in the system tray.
2 of the children's profiles appear to be protected, but 1 is not - i've gone through the settings and can't find anything different about this profile.