Gallery Layout Issue

Hey guys, I have a site where im using the gallery plugin and the grid layout is messed up on the gallery page. Please see http://bit.ly/UyjOFt

The layout is 4 thumbnails and then 1 and then 4 and 1, I just want 4 across. Anybody know how to fix? Thanks.

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