RMAN not obsoleting backup

Question

Hi,
In my 10gR2 database, level1 backup is taken every nigh except sunday, retention policy is set to redundancy 1.
but rman not considering previous backup as obsolete.
below is level1 backup script.
{color:#0000ff}cp $ORACLE_HOME/dbs/orapworampls /backup/RMANBACKUP/orapworampls_backup
# start the rman backup
# only use the next line if this script needs run via root CRON
#su - $ORACLE_OWNER -c "$ORACLE_HOME/bin/rman 'target /'"<< EOF
$ORACLE_HOME/bin/rman 'target /' catalog rman/rman@rman<< EOF
configure retention policy to redundancy 1;
resync catalog;
configure backup optimization on;
configure controlfile autobackup on;
configure default device type to Disk;
configure device type Disk parallelism 2;
configure channel device type Disk format '/backup/RMANBACKUP/%d_LEVEL1_DATAFILE_%s_%p_%D_%M_%Y.bak';
configure maxsetsize to unlimited;
configure snapshot controlfile name to '/backup/RMANBACKUP/ORAMPLS_SNAPCF.f';
set controlfile autobackup format for device type Disk to '/backup/RMANBACKUP/ORAMPLS_CONTROLFILE_%F';
show all;
run {
allocate channel ch1 type Disk maxpiecesize = 1024M;
allocate channel ch2 type Disk maxpiecesize = 1024M;
backup
format '/backup/RMANBACKUP/ORAMPLS_CONTROLFILE_%u_%p_%c' (current controlfile);
backup
incremental level 1
tag 'ORAMPLS_DATAFILE_LEVEL_1'
format '/backup/RMANBACKUP/%d_LEVEL1_DATAFILE_%s_%p_%D_%M_%Y.bak' (database);
release channel ch1;
release channel ch2;
run {
delete noprompt backup of archivelog all completed before 'sysdate - 1';
run {
allocate channel ch1 type Disk maxpiecesize = 1024M;
allocate channel ch2 type Disk maxpiecesize = 1024M;
backup archivelog all
delete all input
format '/backup/RMANBACKUP/%d_ARCHIVELOG_%s_%p_%D_%M_%Y.bak'
tag 'ORAMPLS_ARCHIVELOG_FULL';
release channel ch1;
release channel ch2;
delete noprompt obsolete;
list backup of database;
quit
{color}{color:#000000}id i manually take backup of any datafile twice, its obsoleting older one.
{color}

Answer 1

Retention policy will not affect incremental level 1 backups directly ,it will become obsoleted when its full backups obsoleted ,backup retention policy directly affect only full,level 0 and controlfile backups,archivlelog as well level 1 backup retention policy will affect indirectly.
For detail read that link i have created some sample cases over here within this threads debate
Re: About RMAN backup !!!!
Khurram