Remember you have it set that guests can not view anything so that is exactly what I see.
I can not comment about a site that I have no viewing permissions. I did find in our records your cpanel site access and I checked your database your classifieds has 4 ads.
The way things work is the cron task expires ads. When you visit admin expired ads over 2 weeks old are deleted. Thus you have 4 ads left and active so as I see it nothing has disappeared. The 4 ads which are current you see on your site otherwise anything else which was expired and over 2 weeks old I would think was properly deleted.