twitter:domain : wrong domain

WordPress version:3.5.1
WordPress SEO version:1.4.9

I did this: My wordpress is installed on a sub directory (/wp)

I expected the plugin to do this:
The twitter:domain tag should be : MySite.com

Instead it did this:
The twitter:domain is : MySite.com/wp

Thanks for your help & this great plugin!

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