As a lot of publishers have often become confused about how their data is displayed in the account control panel, the AdSense team decided it was time to clear things up.
I had some confusion not too long ago, so this is quite helpful.
Your ads are being tracked on multiple URL channels.
Let’s say you’ve set up 2 URL channels - one to track example.com and to track www.example.com/page. The URL channel example.com will track clicks and impressions from all subdomains, subdirectories, and subpages of example.com. As a result, one click on www.example.com/page will be tracked on both of your URL channels, which means you’ll see two clicks recorded in your channel reports. However, your aggregate reports will show you the correct number of clicks, one, with no data duplication.
