I don't know why the transaction OMJJ shows wrong entry for vendor consignment.
Please check real configuration table T156S with movement type 101 and receipt indicator X.
There is no entry with special stock K (vendor consignment).
So don't confuse about wrong entry. You can ignore it.
As I told you, only 08 origin is used for STO GR (movement 101) in standard SAP.
Regards