Do not worry, the double order / double invoice is NOT a double charge nor a double order
In fact, the story comes from a peculiarity of European and French law, which we call the "retractation right". In short words, the law says a private customer can return his product up to 7 days after purchase if he changed his mind (provided it did not use it
).
What you receive upon ordering is a an email confirming your order. You get your serial number with it.
Then, a week later, you receive another email with the final invoice, because the legal 7 days period has elapsed and the invoice can be printed. This completes the original order but in no way constitutes a second charge
I hope this is clearer for all.
So, to be concise :
1 - first email is an acknowledgement of order and you have your serial with it.
2 - second email is the real invoice.
In all cases, no double charge (if you find so, please advise at once)