On a 12c R2 RAC DB, Oracle instance information on crsctl is shown incorrectly
With a valid support contract, you can check this:
Database Instance Resources Sequence in "crsctl stat res -t" Output Mismatches With Output of "olsnodes -n" (Doc ID 1580894.1)


  The node ordering is not guaranteed to be same as instance number
  ordering. CRSCTL output in sorted order is not guaranteed.
  
  ...
  
  This is expected behavior.