Picklist should split by warehouses

I start the process by creating a sales order with two items and in the Whs column I have warehouse A and B. Then I create a stock transfer request and then a pick list in SAP. On Produmex SCAN, open Picking, select PickList, picking the goods and click Transfer, next select the target warehouse/location. Produmex give me information about everythings is fine and create document. In SAP I see document that was created by Produmex BUT all rows have ONLY warehouse A NOT A and B.