2 Shipments created instead of 1

Hello Experts,

I have an issue in SAP, the system creates for deliveries with the same ship to and the same date of delivery 2 shipments instead of one ! while checking, one of those shipments has no route defined, although the delivery included in this shipment has been defined with a route! could anyone knows why shipment didn't take into account the route in delivery ??

Thank you for your help.

Regards,