Producty listing/Checkout page URLs keep changing

-- HikaShop version -- : 2.3.2
-- Joomla version -- : 3.3.0
-- PHP version -- : 5.4.19
-- Browser(s) name and version -- : varies
-- Error-message(debug-mod must be tuned on) -- : no errors

I have a discrepancy between the Hikashop Checkout URLs. When I click the "Proceed to Checkout" button, the URL is /store/shop/checkout, but when I use the Hikashop Checkout menu item, the URL is /store/checkout. The reason this is a problem is that I am using the Cart module on product pages while shopping, but I do not want it displayed on the Checkout page. However, with the first URL above, it is displayed as that is a SHOP page. So how do I fix this? I'd like to use the proper Checkout URL for the "Proceed..." buttons - that is, the one that is used when I set up the Checkout menu option, /store/checkout .

In addition, the URL changes when the shopping cart is empty and I go to the Checkout page. It redirects to the display of products, but the URL is now /store/checkout/product/listing. This again causes issues with the modules as there is no such page to un/assign them to.

How do i correct these issues?