Woocommerce catalog thumbnails don't look right at all

I am using woocommerce with the “Responsive” theme. I am just starting to develop this version of the website so I just put in one product and then duplicated it and then put in the shortcode for that category (kayaks) to display on this page: https://www.skylinewatersports.com/wordpress/kayaks/

But it looks horrible! It’s spreading everything out. When you click and view and individual product it looks ok, but how can I make the category page look good?

I’ve tried grid view and list view. I’ve tried various thumbnail sizes. With good direction I could try going in and fixing up the CSS but I don’t know where to start.