[Plugin: NextGEN Gallery] Click on NexGen removes view of posts

I’m making a property website. I have a list of posts, displayed in a category. Each post is a property and so they form a long list.

In each property/post, I have a NextGen gallery of images of the property which works fine.

However, when I click on one of the property images being displayed on the post – all the other posts below disappear.

I’d like the category list to remain instead of the NextGen gallery taking the post to a new webpage.

Any clues, anyone?

http://wordpress.org/extend/plugins/nextgen-gallery/