I am using a custom mp_productlist.php page in my template

I am using a custom mp_productlist.php page in my template folder, however the pagination doesn't seem to be working correctly on the products list page, when you initially visit the page http://www.madtowndevelopment.com/2013/thekitchengallery/store/products/ there is no "next" button at the bottom of the page, however, once you change the order of the products or filter them into a category like books the "next" pagination button at the bottom appears. I need help getting it to show up when somebody initially visits the page.

Ryan