GOOD POINT, he said both fobs lock and unlock, but if he has not tried to START the car with both fobs, then do it, sir! You might have a bad/missing RFID chip in one fob (like if you changed cases,etc.)

Just locking/unlocking hte car does NOT test the RFID chip in the key. The lock/unlock is a function of the battery operated transmitter in the key. Starting the car is a function of the RFID chip in the key.