IRRELEVANT ADS ON ADSENSE SITE

Hello, I've been with adsense for quite some years now and i must say I'm still learning. For years I used to have low cpc regularly until I found out it was cause by url error I was getting. Everyday I preview my post adbots would crawl it, then when they come back to that page and they didn't find it I get url error that leads to irrelevant ads and then low cpc. So I fixed that. And all was ok for a few months until I stopped sending traffic to my site for about a month or so. I started sending traffic to my site about a few days ago and I discovered irrelevant ads again. Before I could visit ipage or hostgator then get back to my site and see those hosting companies ads. Now all i see are are those download now(green or blue) annoying ads. I also noticed that I just got a subdomain that isn't verified. It is the same site but www version. So I verified it. Does annoy one now the problem?