Missing controlfile backup

I full backup a 10.2.0.4 db to tdp daily using catalog with following settings-

run
{
backup filesperset 25 full database include current controlfile;
backup filesperset 50 archivelog all delete all input;
sql 'alter database backup controlfile to trace';
}

RMAN configuration parameters are:
CONFIGURE RETENTION POLICY TO REDUNDANCY 15;
CONFIGURE BACKUP OPTIMIZATION OFF; # default
CONFIGURE DEFAULT DEVICE TYPE TO 'SBT_TAPE';
CONFIGURE CONTROLFILE AUTOBACKUP ON;
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE DISK TO 'cf_%F';
CONFIGURE CONTROLFILE AUTOBACKUP FORMAT FOR DEVICE TYPE 'SBT_TAPE' TO 'cf_%F';
CONFIGURE DEVICE TYPE 'SBT_TAPE' PARALLELISM 2 BACKUP TYPE TO BACKUPSET;
CONFIGURE DEVICE TYPE DISK PARALLELISM 2 BACKUP TYPE TO BACKUPSET;