Time limit not enforced, started recently

Starting about 2-4 weeks ago, Norton Family settings have NOT been enforced.  Mainly, my boys have unlimited time.  For months, it was set to 1 hour on the weekdays and 2 hours on the weekends and always worked.  I just checked the settings, and they are correct. 

My Norton Family version is 3.6.3.24, set to auto update. And their PC is Windows 7 Prof, 64bit, with Microsoft updates set to automatic. 

Any ideas??

Craig