All in One SEO pack – meta tag duplication

I’m using the All in One SEO plugin for my site londonsmiles.com but after checking the source code the meta data below is getting duplicated 3 times

[ Moderator Note: Please post code or markup snippets between backticks or use the code button. Don’t use <strong>.]

<!-- All in One SEO Pack 1.6.15.2 by Michael Torbert of Semper Fi Web Design[304,311] -->
<meta name="description" content="Thurloe Street Dental South Kensington is recognised as one of the most prestigious cosmetic dental practices in London, Accepting new patients" />
<meta name="keywords" content="Dentist South Kensington London, Cosmetic Dentist, Thurloe Street" />
<!-- /all in one seo pack -->
<!-- <meta name="NextGEN" version="1.9.6" /> -->

This bit of code has also been duplicated in the header:

<link rel="EditURI" type="application/rsd+xml" title="RSD" href="https://londonsmiles.com/xmlrpc.php?rsd" />
<link rel="wlwmanifest" type="application/wlwmanifest+xml" href="https://londonsmiles.com/wp-includes/wlwmanifest.xml" />
<link rel='next' title='Our Practice' href='https://londonsmiles.com/our-practice/' />
<meta name="generator" content="WordPress 3.4.2" />
<link rel='canonical' href='https://londonsmiles.com/' />

Any ideas on how to get it sorted?

Many thanks

Marcus