Oh, are you talking about these numbers?
Those are actually the opposite of what you’re looking for, I think. I think those are referencing the
tags placed actually in the HEAD of your website and not actually included CSS files.
When Firebug tells you the CSS files is called “yourdomain.com” it’s telling you the CSS is located directly within the current document and not in an external CSS file. And I’m assuming the #1, #2, #3 are telling you the first, second, third, etc, sets of
in your document. And the multiple instances are just referencing different CSS rules within those style tags. If you view the source of your site you’ll see you have tons of plugins shoving tons of CSS all throughout your site’s HEAD that are completely separate from actually including CSS files.