The way I understand it is you can pick the PWA clause or the FOM clause. The PWA says your backup flight has to be 2 or more hours after the first flight. Doesn’t say anything about the second flight being on Delta metal (from memory). FOM clause doesn’t mention 2 hours between but the backup must be Delta metal so they can PS you on it. You are getting what you are paying for from me BTW. DYODD.