The liability of the Indemnitors hereunder shall not be affected by the failure of any party to sign any such bond, nor by any claim that other indemnity or security was to have been obtained, nor by the release of any indemnity or Indemnitor, nor by the return or exchange of any collateral that may have been obtained; and if any party signing this instrument is not bound for any reason, this obligation shall still be binding upon each and every other party