2010 google new algorithm killed my sites

i have many Multiple sites,same url,same title and page content.
domain1 is one of my ecom website indexed 5000 pages before but now drop to 300.
the curious thing is that when i site my catalogs such as:site:domain1.com/catalog1,google indexed 1000 or more???!!

who can tell me what happened to my site?

 

google still index these pages but in a deeper database and not show on normal search

 

Hi,

In my own experiences, Google would only index original contents and thus those duplicated pages would be dropped accordingly.

all the best,

 

thanks
now the question is :how to return the deeper database pages back to normal database?
do i need to delete my Multiple sites?
or some other best and effective ways....

 

means google 2010 algorithm has been cracked..

 

I don't get yet dude

 

In this new algorithm Google have some new strategies. under these one is if a same data available so many places that will not be prefer in
Google rank. By this cause your website is facing this problem.