Shopping Cart Quantity Not Working

Hello fellow designers,

Currently I am designing a site and currently I am setting up my shopping cart and checkout. The problem I am having is when I am adding the “add to cart” to the product page. Everything seems normal at first, but when I increase the quantity on the current product and add it to my cart. My cart doesn’t receive the quantity I chose. Also when I increase the quantity in the cart and proceed to checkout, the quantity I the checkout hasnt changed and is still stuck at a quantity on ‘1’.

Thank you for your time.