That last is how it's supposed to show up. I've been posting on my Dev Journal about it, but I wouldn't stress. The first person they checked out had been charged the right amount. Evidently, it looks like a bug on the receipt. Since that's all I see, I panicked when they sales started coming up with the wrong prices.
Don't take my word for it, though. If you can check the account online do that, and submit a ticket to their customer service as well, so they can watch it and make sure. I sent an e-mail out to people, but you are probably one of the no-replies.
Anyway, I don't know if this is related, but their site stopped mailing out for a while last night and then this started happening. Your download links probably show a typo in the title that I corrected before going live as well. I think they had a major bump last night and things haven't recovered.
As I said, report it to make sure, but so far it seems like bad reciepts, not a bad charge.