Welcome to the Q&A Forum

Hi Justin, Do you really want the feed of comments on posts?  In my experience, this tends to be of limited use anyway.  One easy, easy option is to delete the comments feed line in your header.php file (go to Appearance...Editor and look for header.php). Alternatively, you could block the feeds pages with robots.txt. Alternatively to that alternative you could switch from All in One to Joost de Valk's WP SEO plugin, which gives you tons of configuration over whether things like this get indexed, templates for meta descriptions, etc.

thanks daniel, i figured out that the metatag missing errors are due to them missing on the "Comments on" feed generated after every post. The actual pages are fine, it is generating feeds for the comments which is where seomoz picked the missing metatag error. Not sure, how I can fix it though as my wp comments are already disabled...