Hi,
I'm just about to set up the warehouse system, but despite of making several purchase orders, the stock of Supplier Locations is always empty. It doesn't show anything. Earlier documentation said that negative stock levels should be shown. In the following I show the reproduction steps of this.

I tested it on the latest run bot (odoo 8) and also on my 4 months old local odoo 8 build.

I refer to the warehouse setup with default demo data.

1. Before I start the procedure, I check the content of the Supplier Location: Warehouse -> Locations -> Partner Locations/Suppliers -> Current Stock -> Removing the Internal Filter -> It is completly empty

2. Partner Contact (res.partner) of AsusTek: -> Sales & Purchases -> Supplier Location set as Partner Locations/Suppliers
3. Purchase Order: 10 iPad Mini, invoice based on generated draft (is maybe not relevant), Destination: WH/Stock, Deliver To: Your Company: Receipts (Note that this Picking Type is also set as Partner Locations/Suppliers to WH/Stock)

4. Purchase Order Confirmed; Delivery Order Transferred; 
5. Warehouse -> Locations -> Partner Locations/Suppliers -> Current Stock -> Removing the Internal Filter -> It is empty!!! Shouldn't it show negative stock of my 10 iPad mini?

6. Back to my Purchase Order: I complete the workflow: Invoice Received, Validated, Paid; Purchase Order: Done
7. Warehouse -> Locations -> Partner Locations/Suppliers -> Current Stock -> Removing the Internal Filter -> It is still empty!!!
8. Opening up the Quant menu also shows me no content for Partner Locations/Suppliers or any children location of it

I really don't understand why no negative stock levels are shown in Partner Locations/Suppliers. Both the documentation and blog entries of Odoo emphasizes that the stock moves are based on double entry system. I assumed that an input on one location should lead to an output on a different stock location. So why are no negative stock levels shown in Partner Locations/Suppliers? Thanks for help!