RMAN backup retention

Oracle 19c

OEL 7

I'm trying to setup rman backups to keep only one copies of database backup and archivelog backups.

My RMAN backup job runs one times per day.

After running for many days, I'm seeing that 2 days of backups are maintained.

CONFIGURE RETENTION POLICY TO REDUNDANCY 1;

I've got my retention policy to redundancy 1 - Which I thought was to mean that I only keep 1 copy of the backups.

But, it looks like I'm keeping 2 days worth of backups.

RMAN> list backup of database summary;

using target database control file instead of recovery catalog

List of Backups

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Key   TY LV S Device Type Completion Time #Pieces #Copies Compressed Tag