Orders table total only reflect first payment

[manueldelreal]

Issue Description

If an order is split into more than one type of payment the order total displayed on the orders table will only reflect the amount for the first payment made rather than the entire order.

Steps to Reproduce

1. Add a product to cart
2. Go to checkout
3. Make a partial payment
4. Complete payment with another form of payment (or same one, key is to split payment into more than one installment)
5. Check order on orders table from the admin

Actual results

total displayed corresponds to the amount on the first payment, rather than the order as a total