Currently you are using the $UPDATE JOURNAL=Y setting which allows a copy of the PDS member to be maintained in the JOURNAL copy.
You will want to change this to $UPDATE JOURNAL=X
From the manual:
Library Update Journaling option. For more information about this facility, see Member Archiving and Recovery Facilities.
No journaling (default).
Old member retention required. Old versions of replaced modules are copied to the backup library to provide previous version recoverability.
Similar to option X but prevents the update to the main library if the journal operation is unsuccessful. Message PDSM021-25 is issued to identify the error and STOW return code 20 is issued to prevent the main library update
Update journaling required. Library update operations are duplicated in the backup library to provide up-to-the-minute recoverability.