[Plugin: WordPress SEO by Yoast] The keyword / phrase does not appear in the URL for this page

I am sure this has been asked a million times before but why does the plugin usually return the error “The keyword / phrase does not appear in the URL for this page” when it clearly does? it somewhat undermines my faith that this plugin, which I love, is working – site is http://www.businessmag.co.uk

Thank you!

Angus

http://wordpress.org/extend/plugins/wordpress-seo/