Lightbox problem

I’m using the huge gallery and I have 5 galleries in one page, when I click on an image the lightbox opens, and it’s possible to view all the images of that gallery, the problem is when it reach the last image of that particular gallery it automatically start to show the image of the next gallery, it doesn’t close.

How can I resolve the problem?

http://www.imaginemore.t2tdesignlab.com/?page_id=141

thanks