GM DRO Backorders

Can anyone give me a valid explanation as to why, when you do a stock order, with customers orders included, backorders at your local PDC don't automatically refer to a facility that has stock available.
Day in, day out, send DRO, reveiw, upgrade backorders & then watch them suddenly bill to another depot. Doesn't make any sense! If there's stock out there, REFER AUTOMATICALLY.
The only justification I can see would be shipping via undesirable means, e.g. UPS, FED-EX, etc.
Stock AVAILABLE, SHIP!
Please Provide EXCUSES!!
Thank You!
Jdpetey
Day in, day out, send DRO, reveiw, upgrade backorders & then watch them suddenly bill to another depot. Doesn't make any sense! If there's stock out there, REFER AUTOMATICALLY.
The only justification I can see would be shipping via undesirable means, e.g. UPS, FED-EX, etc.
Stock AVAILABLE, SHIP!
Please Provide EXCUSES!!
Thank You!
Jdpetey