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Google has processed my Sitemaps. Webmaster Tools claims to have indexed 44,797 links to one of the files, even though it contains only 4,582 links.
Here is a cap:
I'm not worried about it, but it's a strange condition and I'm sure you can learn something from it. What's happening?
TO UPDATE: This is not a duplicate of the question, "Why is there a difference between URLs sent to a Sitemap and URLs in the Google index?" Here is the reason, as I explained in the comment below:
I understand that Google may index many pages that are not in my sitemap. The webmaster tools state that there are many thousands of such sites. It is strange that the table above shows how many links there are in a particular sitemap file therefore, it seems impossible for this number to exceed the number of links in the file. Unless, of course, I miss something.
One theory: Could it be that many versions of the same pages – possibly with different parameters – have been indexed?