Lightbox Not Functioning on Random Products

Hi guys – I have a strange one here…

On some of the products in the store, the images don’t open in a lightbox.

Does not open in Lightbox: http://nationalgolfschool.com/golf-school-vacations/fossil-creek-golf-club/

Does open in Lightbox: http://nationalgolfschool.com/golf-school-vacations/harmony-golf-preserve/

I have cloned the site and made a copy using another domain for testing purposes. Switching to the Twenty Twelve theme, the images do open in lightboxes as expected.

Twenty Twelve theme, all the same plugins running, same item as above: http://americasgolfschool.com/golf-school-vacations/fossil-creek-golf-club/

I also noticed that in the WooCommerce settings area there is no “open in lightbox” setting when the Enfold theme is selected. http://cld.wthms.co/s6gw

I don’t really know where to go to troubleshoot this since it’s somewhat random – I say somewhat because it happens to items that were added to the store alphabetically beginning with Tennessee (Tennessee, Texas, Virginia & Wisconsin).

I’d appreciate your help. If you’d like login credentials let me know and I’ll send them.

Thanks!
John