My problem is that when at the checkout page, and the customer enters the coupon code and clicks "Save", it takes them to a new page and asks them to fill out their customer information. And then it will proceed with a new page for each portion of the checkout (shipping, payment, etc) until you have finally done everything, and then it will take you back to the main checkout page with all of the information on it and you can finally see for the first time if the coupon code actually worked and what your total is. My shopping cart template is supposed to be a 1 page checkout where they can put in all of their information on the same page without having to go through multiple pages. As soon as a coupon code is entered, it forces them through various different pages before you can see if the coupon worked.
Thank you in advance for your support!