Zoom feature bringing up wrong images in Core Photography theme

Hi,
I have the Core photography theme installed and customized on my website. When i click on my images on my homepage gallery it brings up another image from my website instead of enlarging the image that I clicked on.

You can see right awaay as you click on the first image you see after getting to my site;
christopherjohnstonephoto.com

This was working fine until i start uploading my images.

Thanks
Chris