In the VT01 transaction If you select deliveries you will get pop up screen.In that screen filter .
In the transportation planning you need to select only 'A' deliveries.Exclude your option B& A so that system will not bring assigned deliveries.
A - Not yet planned
Delivery is to be processed in transportation planning.
It has not yet been assigned to a shipment document.
B - Partially planned
Delivery is to be processed in transportation
planning. The delivery has already been
assigned to at least one shipment document but the
transportation chain is not complete (see status C).
C - Completely planned
Delivery has been assigned to one or more
shipment documents in transportation planning. Depending
on the leg indicator in each shipment header, the delivery is
considered to be completely planned if
- it exists in a direct leg or a return leg or
- it exists in a preliminary, main, subsequent leg or
- each stage assigned to the delivery connects to a
subsequent stage, thus connecting the point
of departure with the destination of the delivery with
no gaps in transportation (as of Release 4.6A).