[Theme: Minimatica] Why are my images in 'pages' opening up to another page?

http://www.chardawson.co.uk

See ‘weddings’, click on an image and it goes to another page!?? It should just pop up in a floating gallery.

How do I stop it opening up to another page? I just want it to open to floating gallery and be able to flick through images.

http://wordpress.org/extend/themes/minimatica/