Multiple inserted style sheet tags

I like the idea of this plugin, and it seems to work ok. However, is there a reason why it inserts 23 separate <style type=”text/css”>…</style> tags into the header, instead of combining them all into one tag, or even better generates an external CSS file?

It even inserts empty CSS rules for options you haven’t edited, for example:

<style type="text/css">
     .main-navigation a, .main-navigation .main-nav ul ul li a {
          font-weight: ;
     }
</style>

which causes parse errors when validating HTML.

Thanks.