OK, here is what I did: I have several web sites. For each of them there is an URL channel. I also created one custom channel for each URL. The code on each site has "google_ad_channel =" for that custom channel. Since it is basically one channel for each URL. I thought that the logs of the URL channel should be = to the logs of the custom channel. But to my suprise they differ in Page impressions, Clicks, Page CTR, etc. Is that normal?