We are very sorry, but you cannot add products to your order once it has been confirmed. Thank you for your understanding.
If you buy "Pre-Order" and "In Stock item" together, your order will not be shipped until Pre-Order item released. If you want to get "In Stock item" soon, please make payment separately. Also, if you order multiple pre-order items with different release dates at the same time, all items will ...
The payment for Pre-Order items are charged on the day you place orders. Not the release (shipped) date.