I'm sure you're not a total idiot! The site is a bit cluttered right now, and Kristen (one of the FSUSA employees) is in the midst of cleaning it up. As an fyi - flat rate shipping is priority mail. There are different rates, but for $5.00, it basically means whatever a supplier can cram into that size box, the price stays the same.
Sorry about your experience with VaporHeads.net; I'm not familiar with the company. However, since I started vaping (February 2010), I ordered from many suppliers. I spent a lot of money and wasn't happy with most of my purchases. In May, I started ordering from FSUSA and am so glad I did. Their juices are awesome!
As an fyi - I'm a volunteer Supplier Associate for FSUSA (meaning I don't get paid).
So, what are you going to order? Do you need any recommendations? If so, just let us know what type of flavors you like.