Activity report shows no activities; computer refused to enforce the time limits

Hi,

I have set up Family Safety with myself as administrator on my son's computer.  However, while at first the system did record activity reports, it now shows no activity whatsoever, even though I know my son is spending a lot of time on the computer.  Also, when we overrode the time limit one time so that he could finish working on something without changing the settings (time limits) on his computer, the computer then refused to further enforce the time limits.  Any one setting that you override one time completely erases the effectiveness and enforcement of Family Safety.  I cannot figure out how to make it work, even after syncing my account and creating an on-line Microsoft account to monitor my son's computer.  I am using Windows 8, and my computer is exactly the same model as my sons.  This situation is extremely frustrating, as my son has locked me out of his computer with passwords and now I have no access to his activity.  Please help!!!!

Thanks and best regards,

R Berger