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Klout Scores at About.me

I'm on about me. They tell us our klout score is determined by how far and wide our influence is on the web,. Since I went on About.me my klout score was 51. I added Twitter. Still 51. I put a profile on Linked In. Still 51. Last night I added my facebook page to the mix. Klout score is now 11. So I add Facebook and my Klout drops. Can anyone explain?