If you made one order for multiple registrations, sometimes it seems that two (or more) orders are shown in your Order History, but in fact you were charged once only.

As a safeguard, first please verify that you have not been overcharged on your credit card statement. If there is any discrepancy, please contact customer support at support@active.com with the information as below. We will go further checking. 

1) Order Number (beginning with C-) or Reg ID (beginning with R-)
2) Holder Name of Bank Card
3) The Last Four Digits of Bank Card which was charged
4) The Exact Amount of Charges
5) Charge Date