Conflict with WordPress Canvas Gallery Plugin

By using Page Builder on this page > http://demo4.susansiow.com/artwork-design/ . The masonry layout generated by WordPress Canvas Gallery plugin > http://wordpress.org/plugins/wc-gallery/ doesn’t make the images stacked together. When the normal WP Visual editor is used to create the gallery, it works fine.

Please help, thank you!

http://wordpress.org/plugins/siteorigin-panels/