First determine if the snapshot is cached or not. If you make a change to your page, does it show up immediately when you reload the hosting control panel? You need a reliable way to see if adjustments you make have any effect. If you cannot rely on your hosting panel, see if you can identify the host's access to your site to grab the snapshot and make note of the user agent. Change your browser's user agent to be the same and see if the ads come up in your browser.
Once you can verify adjustments have an immediate effect on a view containing ads, temporarily disable all plugins and see if the ads go away. Try switching themes as well. If the ads go away, reactivate one plugin at a time until the ads reappear. Discard that plugin which causes ads to display. If none of this removes the ads, your core code is corrupted via a hack and you need to delouse your site. See FAQ My site was hacked.