[Plugin: NextGEN Gallery] Lightbox image showing up behind thumbnails

Hi there. I have used the gallery shortcode on my Gallery page, but for some reason when you click on an image to get the lightbox version it shows up behind the thumbnails. What’s going on?

Here is the page: http://www.kindredbody.com/gallery/

Thanks.

http://wordpress.org/extend/plugins/nextgen-gallery/