As mentioned, this was a result of an in-place upgrade from 80.10. Since this versions is running an ext3 file system, and is apparently a victim of the scheduler bug causing painfully slow snapshots, the plan was always to go to a fresh install. With that in mind I did an mds_backup and GAIA backup, logged in to LOM, fresh install from the Management ISO with clean xfs partitions, ran the mds_restore script, and all duplicate policies were fixed. I can't say I can explain why - I was expecting to see them but just needed to go from 3 hour snapshots to 5 minute snapshots - which this fresh install accomplished. I had already tar'd and moved all logs off the system, exported all backups/snapshots, and cleaned up as many files as I could. In any case, this issue worked itself out in the fresh install - which was an added bonus.