I've been an AdSense user for many years, and never had a problem until now. Almost every day in May has seen my AdSense report show high and clearly incorrect impressions. These are only ever for one or two channels per day, and a different channel every day. I have my AdSense account set to allow my ads only to be shown on my site.

As well as analysing my web logs and using Google's Analytics, I have recently added a PHP routine in the header of every page that stores IP address, date, page and hits in MySQL. As there is no way onto any page on my site without executing this, so it should give me the absolute number of page views (including visits from bots).

At the time of writing this figure is < 2000, which is which is the total visits from 0000 HRS - 1000 HRS. I'm in the UK and my AdSense zeroes out and resets at 0800. By 0900 AdSense had already logged > 9000 impressions. All the erroneous hits are on one channel.

An average day should see 10000 java enabled page visits. This month has seen days where > 34000 ad impressions are logged, but I have no record of the additional 24000 page views on any of my stats.

To confuse me further, pages with ads only every have one ad unit on them, and any page with an ad unit also has a link unit. The link unit impressions are always fine and correspond with all my traffic logs.

I have emailed Google about this and been advised that if I have used their Allowed Sites then everything should be fine.

So like I say, I'm stumped. All I can make of it right now is either a) AdSense figures are wrong, but I've never see anyone complaining about impressions being too high, only too low OR b) Someone's ripped my AdSense code, but presumably the Allowed Sites feature should stop impressions being recorded.

If anyone has any ideas, or has experienced the same I'd welcome the comments.

Thanks,

Dick