WillieO on "[Plugin: WordPress SEO by Yoast] The site name is being added to titles with no spaces"

The sitename is being added to all of my titles
<title>Ritchie 4 inch flush mount marine compassBoat Parts US</title>
As you can see above it added Boat Parts US to the title and left no space. This is something I can't seem to get rid of.
I am using woocommerce and all of the products have the sitename added has anyone had this problem?

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