Hi Roman,
Sorry for updating very late on this but thought to update now for fellow members.
Issue with sapstartsrv: Resolved by editing /usr/sap/sapservices file as there was some hidden character present.
Issue with DB instance: DB instance 1 was getting relocated to Node B along with PAS service relocation from Node-A to Node-B: This was happening because one of the dbenv* profile at OS level of Node-B was updated with wrong instance number (DB instance number : one character SID1/SID2/SID3 etc.). Instead of SID2 it was SID1 due to that DB instance 1 was getting started on Node-B when PAS was moved to Node-B.
Thanks,
GS