earthsprite on "[Plugin: WordPress SEO by Yoast] Double post titles on Google+ again"

This is the Yoast SEO header in my index page. You can see the duplicates:

<!-- This site is optimized with the Yoast WordPress SEO plugin v1.4.4 - http://yoast.com/wordpress/seo/ -->
<meta name="description" content="Personal blog of Julie Arnold."/>
<link rel="canonical" href="http://earthsprite.com/" />
<link rel="next" href="http://earthsprite.com/page/2/" />
<link rel="author" href="https://plus.google.com/117467981963677534081/posts"/>
<meta property='og:locale' content='en_US'/>
<meta property='og:title' content='Idle Journal - A Diary of Living, Livelihood, and Finding a Calling'/>
<meta property='og:description' content='Personal blog of Julie Arnold.'/>
<meta property='og:url' content='http://earthsprite.com/'/>
<meta property='og:site_name' content='Idle Journal'/>
<meta property='og:type' content='website'/>
<!-- / Yoast WordPress SEO plugin. -->

I also found this in my header.php but I'm not really sure what it's doing.

<title><?php wp_title(''); ?><?php if( wp_title('', false) ) { echo ' &ndash; '; } ?> <?php bloginfo('name'); ?> &ndash; <?php bloginfo('description'); ?></title>

Other threads with same issue:
http://wordpress.org/support/topic/duplicate-meta-propertyog-title-bug?replies=1
http://wordpress.org/support/topic/duplicate-meta-descriptions-2?replies=1
http://wordpress.org/support/topic/how-do-i-avoid-duplicating-site-title?replies=14 <-- this one reportedly has a fix?