Hello Herald,
It looks like the system got a bit confused when it was figuring out the shipping for your order. I have adjusted it and have issued a refund for the difference to your original payment method. You should see a refund of $5.32 on your account as soon as your bank processes it.
Since the Adventure Path shipped already I had to move the rest of the items into a new order so that they would be able to ship. The new order number is 3741969.