Yesterday i have more keywords in first page of google result. And today, when go to home, check it and the pages indexed increase +2000 and almost keywords dropped to page 4 and page 5 in google.com What's happedn with my site? May google "dance", my site has 2 months old and it "dance" more time before... ....
Google has thousands of data centers and you'll have to wait and see if the changes propogate accross the dcs.
i think due to less impression on your site google used to index good trafic sites Only High Rank Sites Get Index on 1st pages
use unique Keywords and get more traffic Unique Content and Good Trafic Will increase your Rank High rank can index your site on 1st page
That means you need more backlinks. Your competitors stepped up and built more backlinks and knocked your rankings down. Be more competitive and take your rankings back.
But up to this time, I still don't know why my TWO sites has ranking dropped in ONE time? Sexy Girl Wallpaper built for 2 month ago and Luxury Car Wallpaper built for 45 days ago.
You have to realise that Google has thousands of data centers and the index is not the same on every dc. Also they run tests and that will cause flux in the rankings. Usually the tests are rolled back.