Credit card charged multiple times

Hi,

We have got a problem.

Customer has created an invoice for amount 66.97 USD.

Instead of charging credit card once for amount 66.97, it has charged twice, one for 14.97USD & 52USD (Which will total to 66.97USD.

So even tough total amount is correct, why instead of charging customer's credit card once for 66.97USD, it has charged 2 times.

I checked in sales order->Payment cards tab and found that in "Authorization Status" details, Amount changed checkbox is ticked. May this be the reason. Please advise.

Thanks,

Dattatreya N R