Haha, but really... I have been moving a lot lately on the SE's... was #2 for a competitive term, then went to #11 for no reason in Yahoo. Now today I moved up 2 ranks to #9 in Yahoo. And I moved down 1 rank to #8... lol
maybe because yahoo and google has distinct algos, one apart from the other. some say that yahoo is still particular with meta tags. for what i know, they're now particular with backlinks and authority sites.
stop obsessing over the little things. Write more content, manage the links, maintain a healthy user experience for your visitors.
The best thing you can do is just dont stop building quality links to your site it always helps. Akash Kumar