@editor FWIW If you are having issues with dnsmasq not doing what you want you can review this post: https://forums.fogproject.org/topic/12796/installing-dnsmasq-on-your-fog-server
The reason why I mentioned it is because a 3 second count down is not part of the standard dnsmasq settings. If you are missing those you might be missing others listed in the above post.
If your dnsmasq configuration is working perfectly there is no need to review the post.