This is a common question due to the way orders are processed. You can rest assured you are not being charged more than once for your order.
The initial bank card transaction is only an authorization and is not a charge. You will see the actual charge(s) happen when the product is invoiced and shipped.
That said, your total purchase amount will be split into multiple charges if materials are coming from different locations. The total of those charges will match the amount you agreed to at checkout.
Still have questions? Feel free to call our Customer Support Team at 800.260.2522