It is ridiculous that on desktop a logical procedure cannot be incorporated into Net. When you have an OPEN PO you should be able to amend quantities at any time. If you receive more or less than ordered quick & easy to alter figures before receiving goods in. Been told all we can do is delete any orders with odd amounts left on (now in pending) & raise new PO's for overs. Just time wasting.
I think this feature has now been implemented
This has been, indeed, added to the functionality of Purchase Orders module within Linnworks.net. You should have no issues adjusting the Quantity in a Purchase order that has a status of "Open".
Linnworks Tech Support