I've never been unlucky enough to see the following before:
YOUR REQUEST HAS BEEN ADJUSTED
Rental companies are requiring a minimum rental duration for your requested rental. In order to find availability, we had to extend your return date/time.
Note that you can return the rental at your originally scheduled time, and if you reserve a pay-later rental there's a good chance you will receive a credit for the unused period, but the rental company may still charge for the full period.
Is the extended return period a fixed duration or does the computer keep adding a day until there is one rental car available?