Sitemap made according to Google's rules, still fails

Usage of subdomains scratches heads on Google's help page

[nycmoomin]

The website example.com has lots of subdomains, each html page has its own subdomain address, total about 150 now. That is why I was recommended to use a Sitemap.

According to the Google description, subdomains are allowed in the Sitemap file. For instance sub1.example.com or sub2.example.com is a part of http://example.com, not a different site.

Each subdomain on this site is only one page, linking to another subdomain within the domain example.com.

So how should *one* Sitemap be created in a situation like this?

Following a recent suggestion by a Level 2 webmaster (on Google's ranking), I'd need to have one Sitemap-file for each page, containing one page in each Sitemap file. That's not what I understand the Sitemap is about.

Grateful for all help on this.
Website: http://example.com
Sitemap: http://example.com/sitemap.xml

[edited by: goodroi at 1:50 pm (utc) on Mar. 31, 2009]
[edit reason] examplified [/edit]

[goodroi]

Welcome to WebmasterWorld nycmoomin!

Thanks for posting this question. I am not sure it is really a sitemap issue. I think this is first a duplicate content issue.

Search engines do not generally like to see duplicate content. If you have identical pages available at example.com/apple and apple.example.com then you should only choose 1 version to expose to the search engines. If you don't the search engines will filter out the duplicate content themselves. Good luck.