Search engines, and specially google, tend to penalise sites with duplicate content. And this happens a lot. To check that just visit http://copyscape.com and do a search on any of your sites to see if you have duplicate content.
If you have a mini site then you probably did a “copy & past” from another site or article, like i did on my mini site: http://dietsforall.com
I did a search and i got two results. But im sure there’s more copies, but unfortunately copyscape.com only shows more results if you purchase a premium account :\
