When I have processed the purchase order at my subcontractor, the needed components are triggered to be purchased and are routed to be delivered directly to my subcontractor.

After receiving the subcontracted product, there is negative stock at the location: "Partner Locations/Vendors" and positive stock at the location "Virtual Locations/Production". 

I have put in a lot of hours already to get this set to zero... but cannot get it done.

I can also find nothing at any available forum about this issue.. 

So I want to ask you guys, is this the correct behavior?