We cannot add items to your payment automatically (paypal or credit card), because we do not have access to your personal credit card or payment information. If we need to change or remove items from your order, please CONTACT US to see if we are able to do it before shipping. We cannot promise that we will be able to do this before your order is shipped, but we will do our best. If an additional payment is required by you, we will send you an online checkout invoice for payment, and your order will be shipped after payment is made.
To add a second order, if we have not yet shipped the original order, feel free to place a 2nd order and mention in the order notes (found in cart) that this is a 2nd order and we will combine it with the first one if we can. When shipping, we will refund the shipping overage on the combined order. NOTE: The second order will not jump the queue to be shipped with the first order; the 1st order will move down the order queue to ship within the fulfillment times of the 2nd order. The 10% discount you may have received on your first order (for an order over $75.00), will not apply to your 2nd order unless it is also over $75.00.