We have setup a downpayment product according to the documentation. The downpayment product is setup as type service and invoice ordered quantities.
The basic behaviour (creating downpayment invoice, creating final invoice with the downpayment deducted/reflected) is working fine.
However, although the downpayment is listed/printed on the offer / order, the amount is not deducted from the total amount on the offer / order
Can someone please point us to where the config is wrong: how can we show the amount payable on the offer (so the total minus the downpayment)?
There is nothing wrong with your configuration. This is the expected behavior of the Odoo system. The Down payment will be reflected only on the Invoices. It's showing in the Sales order only for information. If you are deducting that value in SO, then the Sales Order value will also be changed from initial.