Jason,
On the SEARCH page, I slected Category: Perennials A-Z and I click SEARCH button.
Search page link: plants_Search.php
The results page link:
plants_Results.php?S_ProductName=&S_ProductCartDesc=&S_ProductCategoryID=1&Search.x=24&Search.y=19&Search=Search
If you scroll to the bottom of the page you'll see the empty white spaces/boxes.
Attached is my results page php file.
Thanks,
Danielle