I can also attest to Hertz basically canceling one of my reservations in the past - needed a minivan to move things to a storage unit and made a reservation for one (7am to 2pm or something like that) and then had a reward one-way reservation from 230pm to 230pm next day... Basically they cancelled my reward and had to go back and forth to get a new res... Hertz makes it seem like it is impossible to need 2 different types of cars in one day