Quantity not display in product page

-- url of the page with the problem -- : www.dexioinc.com/index.php/events/produc...bruary-focus-seminar
-- HikaShop version -- : 2.6.1
-- Joomla version -- : 3.4.8
-- PHP version -- : 5.6.17
-- Browser(s) name and version -- : Chrome 48.0.2564.109 m
-- Error-message(debug-mod must be tuned on) -- : no error message

In the module that displays all of the products, I can get the quantity to display... HOWEVER once you click on a product to select options, you can not change the quantity number.

This is specifically an issue when we have an item where multiples of the same product result in a discount price.
See this product: www.dexioinc.com/index.php/events/produc...dexio2016-conference