Listing page layout

Hi

I am sure this has a quick answer but I am stuck. I am using this plugin to create a directory on my site. I've gone through the install, saved my settings and created 3 entries in 2 different categories.

When I've used a shortcode to display the list of categories on my main listing page, instead of a grid I get a simple list of all the entries with their content details below. Here is a link to the page;

http://www.extrafriends.co.uk/listings/

I'd expected to see a grid of categories with numbers in brackets next to each, notifying how many listings are in that category. Can you tell me what I am doing wrong please!

Thanks

James.