Products not listing correctly in Product Listing

I have my products listed in column fashion 3 columns with products going across the way. One a couple of rowas it looks like the product gets bunched up. Here is the link to describe what I am talking about:

http://www.koisale.com/store/index.php?main_page=index&cPath=5

All the different grades go in their respective column and 2 rows are giving me problems (3rd and 4th row).

Also how do I increase the top of the page so it is the same width as the product listing?

Thanks in advance for your help

It's hard to know if it's causing your problem, but it's not a good idea to use .bmp images on a website. Try saving them as .jpg and see if that helps.

The only way I can see to make your header image the same width as the product listing is to resize the image itself to that width.