Problem with Image Grid Display

I am unable to set 30 images to display in my feed:(http://robertandashley.theycallitlove.com) like the one shown here on this site: (http://garypeppergirl.com).

It doesn’t seem to matter what amount of images I set it to display, I am not seeing more than 20 at once, and they are all displaying spaced out.

Any help with this would be greatly appreciated!

http://wordpress.org/plugins/instapress/