FB like popup under content

Hello,

I have a problem with the FB like popup window appearing under the content.

[img]http://www.bullishsolutions.com/fblike.png[/img]

I’m using wordpress.

Can check it online here: http://www.aprenderjapones.com/curso-de-japones/introduccion-escritura-japonesa/

Thank you for any insight on how to correct this issue. The plugin is the best!