You don't have a one DAY retention policy, you have a REDUNDANCY of 1 retention policy. If you took another backup you'd see that the first back should be obsolete. What is in backupsets 187-258? I assume you are in archivelog mode and are also backing up the archivelogs?

B&R is something you can not afford to get wrong...as davey23uk mentioned, you really should read over the RMAN docs.