Channel Data not accurate, why?

[Seige]

Channel are very useful tools, as many have told me. With the current new URL Channel, I find that there are several weird problems with the data.

I put 3 adsense blocks on my webpages, under one URL. All with different channels. But the sum of all those 3 channels (whether impressions or clicks) don't sum up to the data of the URL channel.

For example:
Channel 1 - 1000 impressions 10 clicks
Channel 2 - 1000 impressions 20 clicks
Channel 3 - 1000 impressions 30 clicks
Channel URL - 3500 impressions 50 clicks.
(the ideal data should be 3000 impressions, 60 clicks)

The only problem I can think of is, that I made a mistake not adding a channel for a particular block. But I've checked it over and certain that I've added channels to all blocks.

[Seige]

Does anybody have the same problem?

[chopin2256]

I think the reason is because some pages have duplicated information. For example, if you have the same ads on 2 different pages, both pages will share the same info. This happened to me as well, I added up all the channel pages, and the impressions were way greator than what I had for "aggregate" data.

[hunderdown]

Remember too that channel data is 2 days delayed. So your totals for "this month" would always show more for aggregate than for channels.

You have to make sure you are comparing the same dates.

[Seige]

I think the reason is because some pages have duplicated information.

I'm certain there are no duplicated information on two pages.

hunterdown: Thanks for the reminder. I'm aware of the 2 days delay on the channel data updates. Yes, I checked them on a few different dates (instead of past 2 days).

Under one URL channel, all 3 channels *should* sum up correctly. Doesn't anybody else have the same problem?

I fear that, if all these data turn out weird. Wouldn't our recorded clicks be misleading as well?

[PaulPA]

When I asked about this a few weeks ago someone suggested to set up channels under www.mysite.com and channels under mysite.com (no www). I haven't tried it yet but it could explain things.

[Seige]

I'm on a subdomain, i.e. subdomain.domain.com

[PaulPA]

Hmmm...Not sure what might create that.

[Seige]

it certainl would help to show you my datas, but that would be against the TOS.

I'm surprised though, why am I the only one having trouble with mysterious data? I was wondering if google was being dishonest with us. But it appears I'm the only one.