Question about url and custom channels.

[proboscis]

I have one url channel and within that url there are two custom channels, one for my link unit and one for my ad unit.

The CPM on the url channel is over 2 dollars more that the CPM for the link unit, and over 1 dollar more than the CPM for the ad unit, but I don't display any other ads on this url other than what is on those two channels. So how can that be?

[belfastboy]

I was just about to ask the same - when i look at a day in agreagte report it is 10 dollars less than the day when I select or all channel data! Which is the real one? Why the different rates?