[Plugin: WordPress SEO by Yoast] Canonical link issue /tag/pages

When I am looking at my tag pages, I notice that the
canonical link for /tag/page/2/ links to /tag/page/2/.

However I would like it to link to /tag/ instead, so I am not
getting duplicate meta and title in google webmastertools.

How does this work? Is it a bug or am I just doing something wrong.

Thank you.

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