Okay, I tried with a back up dataset to Edit/Locations after the POA has made it active and that does not work to correct the Pick Sequence to default. The damage is done when you make it active in POA. The only option seems to be to use Inventory/Edit/Item Maintenance/Picking Sequence to correct it at that point.

I suppose our only good option is Inventory/Edit/Item Maintenance/Picking Sequence immediately after creating the PO.

We'll also have to do the same to manually correct the 150 we've done previously.