When you place an order using PayPal or Amazon Pay, the funds are automatically deducted from your account when you place your order. This allows us to reserve the next available inventory to your order.
If you would like to add or make adjustments to an existing order after placing your order with PayPal or Amazon Pay, any additional charge must be paid by card. Additional card charges will charge your card automatically. Alternatively, a separate order may be placed for purchasing additional items. If you have any questions, please don't hesitate to contact us!
For more information about placing your order using a credit card, you may find this article helpful: How WakeMAKERS Charges Your Credit Card: Understanding Authorizations and Captures