As you have said the return delivery was done automatically via QA11..
Is this happens in standard or some help from badi or user exit (may be I am asking a wrong thing, but I haven't knowledge about QM module)
At the time of return delivery, you have reduce the PO and inbound quantity as per return delivery quantity..
Or you have to set delivery indicator in PO item level.
Then it will not shows in MD04..
As of my knowledge it can't be possible in standard..
You have to use any user exit or badi to achieve this...