I just placed a big order today. I used a $25 for $100 Groupon and also the $50 off a $100 purchase (I received this offer in my email). When you go to use your Groupon, the only way you can enter a code in is to use the vistaprint.com/groupon-wedding (or groupon-weddings maybe). So, what I did was fill my cart, close that browser window, open the link from Groupon and enter the code, log on to my account, then close that browser window and click on the link I had in my email. Once I clicked on that link and logged on, the Groupon $100 came off AND I got the $50 off because my order was over $100. So, I got $150 worth of items for about $41 (shipping was around $15 and the Groupon price was $25). That sounds incredibly complicated... but it really didn't take very long to figure out. I know that's not the same issue you were having, but hopefully this helps someone else out.