Don't worry, you weren't! If you see two charges for the same order, the business you ordered from likely issued you a partial refund. it's due to a quirk with how certain banks handle partial refunds. What happened was the initial charge will be returned to you, and only the second, lower charge will be collected from your account. Please allow up to 5 days for the initial charge to be released back to your account. If you have any problems you should contact your bank to clarify.
When will I receive my refund?
Often, the refund will appear in your account immediately. However, in certain situations and with certain banks, please allow up to 21 days for the refund to appear in your account.