Error 1: Currently the E-Commerce shopping cart 'update item quantity' button changes the quantity on all items in the shopping cart. For example, if our customers purchase two different ILCs and would like to have 3 seats in one ILC but only 2 seats in the other ILC they cannot do this. The only way to accomplish their end goal would be to submit multiple transactions, which is inconvenient to them.
Error 2: Additionally, each time you leave the cart to add another item, once you return the cart automatically sets all quantities back to the default '1', and requires you to reset all of you items to previously selected quantities.
Recommendation: Allow each shopping cart item's quantity to be altered and changed independently of other items, and add a button that will let you update all items to the same quantity should the need arise. And make sure that previously set quantities are saved, so the user can leave the cart to add more items without losing data.