Hi,
You need to make them the main photo for the entry. The "All Restaurants" listing uses the main photo.
This FAQ describes how to set they main photo:
http://www.guidegecko.com/help-publish2#include-photos
You may also have a problem with caching in your browser. Try reloading the images in your browser (right click, open image, press CTRL+F5)
Best,
Daniel