I have a problem with Backorder. In my configuration Invoice is set to "Invoice what is delivered" the same is set on the products.
When I have an order and push the delivery button, I have a Demand, Reserved and Done button. I enter the done amount on different products and validate the order and create a Backorder. That's straight on, but then Odoo creates a full invoice and a credit invoice for the products I haven't received. I have expected that I still have an order where I can continue receiving products and creating invoices.