Hi there,
You can tell if you have mistakenly ordered more than once by the fact that you would have received more than one email from "receipt@clickbank.com". Each email would have a different receipt number on it.
You can always look at your credit card statement to double check! There should be a charge from Clickbank/Keynetics.
If you have ordered more than once then please email us straight away to the email address
support@rocketlanguages.com
so that we can refund the mistaken purchase!
Did I order more than once?

sujung-lee
June 18, 2010