I've a site 1.5 years old; WP blog, 1 main keyword, filled with ~ 90 ezinearticles

G-search:
site:mydomain.info
==> 120URLS

G-webmaster-tools, Index status, advanced:
TOTAL indexed: 0
NOT selected: 48
Blocked: 0

I start to fear that dup content matters
Anybody else seeing that? What does it mean? Am I an ignorant noobhead not having seen that before?

This has always bothered me. One of my sites has about 350 pages indexed in webmaster tools but in google it lists about 470. There aren't even 470 pages on my site -_-.

Maybe site:domain.com refers just to the URL itself, while the default search without operator (like site: ) refers to the actual content. This is what I am currently thinking of.

So, does G distinguish between content and URL? Is it possible, that G knows about all urls of our sites, but not all content from those known urls is indexed? Somehow this makes sense, since many URLs refer to no content or duplicate content.

So, in contrast to popular belief, site:domain.com does not correspond to indexed content but only known URLs of this site, right?