I'm trying to set up my e-shop with Magento Community Edition to allow the customer to choose at checkout whether they want to ship with USPS or UPS. I have gone into the system configuration and set up the information for both accounts. Prior to adding USPS, I tested my website and see that UPS is available as a shipping option. Then I added USPS and tested again and now I only see USPS. I would like both options to display.