Slideshow NGG boxes running together

I have several galleries and my settings in Gallery Settings are set to:

Override thumbnail settings – YES
Thumbnail dimensions 450 x 200
Thumbnail crop Yes
Images per page 20
Number of columns to display 2
Enable AJAX pagination No
Add Hidden Images No
Use imagebrowser effect No
Show slideshow link Yes

All my pages are looking great with the smaller thumbnails such as this:
http://charitycharms.com/symbol-charms-gallery/nggallery/symbols/symbols-animals-nature

This one specific page is the issue, note how the thumbnails overlay.
http://charitycharms.com/custom-charms-gallery/nggallery/charms-2/round-1

I have tried setting the columns to 0, 3, 4, 5, 6 and none allow for the images to not overlay

Any ideas?

https://wordpress.org/plugins/nextgen-gallery/