Looked at you link...I might suggest that you rethink this layout and move the description to standard Zen Cart placement(next to the image) to take up the "white space" and drop the repeat of the product image in the table array that you have created and resize it in width so that it can tuck up under the image and description.

Also it looks as though you are displaying the same image as an additional image at the bottom but this is not named correctly(the file) for usual display of additional images. this might be that you need to prune the image folder for these extraneous images
JMO