I would like to sell tickets online

I currently have two different ticket formats set up for purchase on a site I have constructed. The first is for a single-day pass and the second is for a weekend pass. I set up the download attributes for each product. It all works fine when placing an order and reaching the end to download the product. Here's the problem. If someone places an order for a single-day ticket AND orders two of them, they are charged for two tickets BUT only receive a link to download ONE ticket. I understand WHY this is happening. I don't know what I need to do to fix it. Please help with any and all suggestions at your earliest possible convenience. If you need clarification, please let me know. Thank you.