16000 page views,only 6000 adsense impressions

[sinkice]

My site page views is 16000/day.And I've put adsense on every pages of the site,but the impress only 6000/day.
I don't know what's wrong with it.The site is shopping site using mambo PHP shopping cart and it have nearly 60 div on the product pages.Will too many div hurt the impressions?
I don't know,can someone give me some good suggestions?

[brotherhood of LAN]

Welcome to the forums sinkice

How are you measuring the 16K views? That figure may be including spiders and robots that won't be downloading and viewing the Adsense javascript, thus not counting as an Adsense pageview.

[bumpski]

One thing I'm fairly certain of, Adsense does not count impressions caused by the use of the "back" button. The same ads show when backing out. The browser may or may not be using cache for this. Once you have backed out and then refresh a page you'll see new ads.

[londrum]

iframes? if you've got 1 iframe then that's 2 page views per page.