Lightbox with e-commerce trouble

I am using 2 lightboxes on my products template page to show the main image and then any extra images for my products. However, when you click on the image the pop-up looks very funny on the desktop view and then the pop-up is not even working for the other screen sizes. Can someone help me figure out how to fix this issue so the popup looks normal on all screen sizes?

Here is my site Read-Only: LINK