In The Replenishment window there is a field "Vendor" which is writable when Route "Buy" is selected. Default is is empty (which I think means that it uses the first vendor listed in the product).
My expected behaviour is that if I select a different vendor and click on "order once" that he takes the selected vendor but it still always creates them with the first vendor. Do I do something wrong? What else is the functionality behind this Vendor field?