Problem:
When using the 'All Day' schedule option for an Oracle RAC policy and relying on the RPO setting alone, more snapshots than expected may be created. This can happen if rules are activated while one node in the RAC is busy or restarting, causing the activation time to be offset for that node.
Solution:
Try using the ‘Scheduled Time’ option rather than an RPO. Also check that the RAC nodes’ times are synchronized.