Computer monitoring stopped working

Where to begin?  About a half hour ago, I received about a dozen messages telling me that my son had visited blocked websites.  I went to your site to see what they were, and it showed NO activity since yesterday, and no blocked sites visited.  About 15 minutes later, my wife (who also receives the notifications) came to me, and lo and behold, there were pages and pages of web accesses (almost all NOT blocked) stretching back into the wee hours of last night.
Well I am pretty sure that my son was not up all night on the computer.  In fact, if your software was working properly he couldn't have been, since it is set to log him off after 11 pm on a Saturday night.  Also looking through the list, there was tons of sites that it is very unlikely that he was visiting (a lot of sports stuff, in which he has no interest).  A lot of the links seem like they might have been just links to banner ads and stuff that might have been on other sites that he might go to. (Why do you show me that stuff?)
So I got to wondering if my daughter might have a similar problem, and I find that it reported that her computer had not reported in for 2 weeks.  I go and check her computer, and the software was still installed, but it was not functioning.  To try and get it going again, I uninstalled it (why does the uninstall NOT ask for a password?).  During the uninstall, I had several things crash.  Eventually, it finished uninstalling, and I was able to install it again, and it appears to be working.
Needless to say, my confidence in your ability to monitor my children has been severely shaken.  What the heck is going on here?  I really like your whole user interface, but if it doesn't work, I will be forced to look elsewhere.
Thanks
John Gaby
 
[edit: changed title to better represent the post content.]
Message Edited by MikeLee on 06-14-2009 11:59 PM