clarification sought on multiple ads per page

[gomer]

The AdSense program policies state the following regarding serving multiple ads on the same page:

Up to three ad units may be displayed on each Web site page, but no ad unit shall contain any advertisement in common with any other ad unit. Serving two or more identical ads on a single page constitutes double-serving, which Google does not support.

I don't think I am understanding this as parts of this seem contradictory to me.

Serving two or more identical ads on a single page constitutes double-serving, which Google does not support. What does this mean, can I serve two or more ads or not? Or does this mean that the same ad should not appear on the page, but if that is the case, we obviously have no control over that.

but no ad unit shall contain any advertisement in common with any other ad unit. What does this mean?

I must be missing something. Jenstar you probably explained this at some time, sorry but I could not find your post.

Thanks.
-gomer

[jadebox]

Generally, you don't have to worry about it. The AdSense server won't serve the same ads in multiple ad units on the same page. What you're not allowed to do is to put the AdSense code in frames in such a way that the server can't tell that the multiple instances are on the same page.

-- Roger

[gomer]

Thanks Roger, that explains it for me.