So I'm trying to purchase the third Humble Indie Bundle (missed out on the last two), but something strange keeps happening. I'm going to spend $6 on it (it's above-average and I'm a tad strapped for cash), but when I go to check out through Amazon or PayPal, it says that it's going to charge me $30 ($29.95 to be precise). Is anyone else having this problem, and if so, how can I fix it?