koganti, I think one storage path was defined at create database time and new storage path was added later, because DB2 if using automatic storage automatically balance disk space according to defined storage paths. If new storage path is added, then DB2 will not rebalance disk storage, because this would greatly influence performance. DB2 ensures that a rebalance will never take place as part of an auto-resize.
I think (not 100% sure) the rebalance will be in place if using backup/restore. This can be easily tested. Make a backup and restore database to test computer.
If I remember correctly "rebalancing DMS container" does not work with automatic storage.