badhttp test problem - alerting on single failure

I have a host where I am doing two http tests against. One of the URLs has shown a tendency to false alarm (go red and then a minute later back green), twice a night.

In an attempt to reduce these false alarms, I used the "badhttp" tag as so: ---snippet from bb-hosts--- 1.2.3.4 URL-Site_Portal # cont;http://mysite.com/public/index.html;Found http://www.mysite.com/private/index.html badhttp-*-0000-1800:1:2:4

The second URL is the one that blips, and adding the badhttp tag has not helped, it still alerts after a single failure, and history shows no status changes to clear or yellow.

Here is a cut and paste of the status when it alerted red (The second check was listed below this one, and was green - also interestingly, the second check shown on the status page is the first URL from the bb-hosts line):

  Wed Oct 11 07:05:56 2006: Server timeout ; OK

http://www.mysite.com/private/index.html - Server timeout

Seconds: 10.31

Is there any way that I can troubleshoot this? Could it be caused from doing two http tests against the same site (maybe badhttp only takes effect for the first one)?

-Charles