Unfortunately we are not able to merge separate orders for shipment. If an order you plan to cancel contains limited edition or out of stock items or coupon codes you will lose the ability to re-order those limited items or use your coupon code on your new order.
Additionally due to pre-order ship dates for products offered by different artists, combining would potentially delay the delivery of one order while waiting on the other.
You will need to contact Customer Support to cancel your original order, then place a new order for all desired items.