Hi, I really do not understand what's happening. Every day that passes, I get worser ranks on Yahoo. I was ~#28-30 for Free PHP Hosting and out of a sudden, I wasn't even listed. It doesn't really make sense to me because when I went to check for the first time I was #32, then started building links and optimizing it for Free PHP Hosting... every thing was doing just great, geting better ranks on other keywords too, then out of the blue, I'm not even listed anymore for Free PHP Hostin and every day dropping like 5 positions on some keywords... any idea guys? I get more links as Free PHP Hosting and I'm removed? :/ I have a page that is semelhant with it, http://www.webasenet.com, could that be it? They share the same database...
I'm no expert, but perhaps you over optimized to the point where yahoo is considering your site as spam? It's happened to me a few times and I usuaully find making my keyword % less agressive helps. Also check your pages for common problems. For example I changed the CMS template on one of my sites and accidentally had 2 title tags (one defined by the CMS and another hard coded in the template). About a couple of weeks after noticing this and fixing it my rankings climbed back up and are now better than ever.
The sandbox is a term for google, not yahoo, but you can over-optimize your site. If it looks like you are "trying too hard" to rank it can have the opposite effect and result in a penalty. If your wording doesn't sound natural, then you should go back to your previous content. Rankings can also fluctuate for no reason other than tweaks in algorithm.
So I just have to check my keyword density? Do you guys think my website is "trying too hard" to rank that keyword?