Jason,
Hi. I entered 605 in the search bar (not from the drop down) and I got a list of all the products in the store.
The URL that returned was this: (minus the quotes)
"http://qlineshop.com/store/Products_Results.php?pageNum_WADAProducts=2&totalRows_WADAProducts=26&Search=1&ProductCategoryID[]=5"
I don't know if this helps troubleshoot or not.
Let me know,
Terry