Hopefully this helps others...
I wanted to add to my original order, so I sent a message to the e-mail address from the order confirmation. I got a response within a few hours. I was told to just place an order and let them know via e-mail. So, I ordered another PCB and badges and was NOT charged for additional shipping. I then e-mailed and asked for my two orders to be combined, and for my original extra badge color to be changed.