When you configure a SnapVault Snapshot copy schedule for a SnapLock volume on the secondary storage system, the Snapshot copies created for that volume are WORM Snapshot copies. By default, SnapVault uses the retention period set by the snaplock_default_period vol option as the retention period for the WORM Snapshot copies.
You should ensure that the retention periods you configured when creating a SnapLock Compliance volume are correct.