Stubborn Clone Retention Time - Savesets won't delete

EMC Networker 9.1 - Problem with our weekly backups.

We have set FULL weekly backups with 2 weeks retention. Recently I noticed the weekly disk volume (where the backups are saved) is getting almost out of space.

Checking the Volume Save Sets I see old Weekly backups with Save Times from 7 months ago still present with a Browsable status, even though their Clone Retention Time is correct (it is 2 weeks after the Save Time).

I tried to change the retention time manually with Change Expiration and selecting Expire the selected save sets NOW, then I ran the following commands to scan the volumes and clean space:

mminfo -q "type=data domain,type=adv_file" -r volume -xcl > volume.lst
for /f %A in (volume.lst) do @nsrim -X -V %A
for /f %A in (volume.lst) do @nsrstage -C -V %A

That didn't do anything, no space was freed and the Savesets were still present.

Next I tried the scanner command:  scanner -m W:\Weeklybackups

It didn't free any space, in addition, I noticed that the scanner commands changed the Close Retention Time for ALL the savesets to 2 weeks in the future!

How do I resolve this, how do I expire and delete old savesets?