Time not working

Originally my son's time was set to end at 9 p.m.  I then changed it to 10 p..m., clicked on update.  But it continues to log him off at 9 p.m.  So I uninstalled and then installed, set up the settings for 10 pm. but it still continues to be stuck on 9 p.m.  Even if I change the total amount of computer time to 23 hours, it is still stuck on 9 p.m.  Suggestions?

Originally my son's time was set to end at 9 p.m.  I then changed it to 10 p..m., clicked on update.  But it continues to log him off at 9 p.m.  So I uninstalled and then installed, set up the settings for 10 pm. but it still continues to be stuck on 9 p.m.  Even if I change the total amount of computer time to 23 hours, it is still stuck on 9 p.m.  Suggestions?