I have no idea how your system works. Second day total clicks were 2 and the other day 0 :-&
Well the amount of clicks the ads on your site receives has nothing to do with their system. Make sure the ads are placed in spots are click friendly and I hope you are getting decent traffic and not throwing ads on a site that gets 20/uv per day. Also remember that no one is really going to click on ads that are not relevant to your site's content.