[touchofevil]

It may be that your bank is charging you an international transaction fee and that is the second charge you are seeing. This happened to me the other day with Coinbase. If you buy from Coinbase with a credit card the transaction actually gets processed in London. Some American banks will charge you a 3% fee for this international transaction. So it will look like Coinbase has charged you twice, but actually the second charge is from your bank.

[gt_]

The second charge is actually an amount identical to the first charge, only 1 minute later. It was a couple hundred dollars.