Don't worry if you can't do check in right at 60 days. You don't have to do online check in in order to book ADRs or FP+, and you can customize your MBs up until around 30 days out and still have them delivered. In fact, I booked a trip at just under three weeks last month and customized my MB the same day, and still received them in the mail a week before I left. So just keep trying and they'll eventually get their system up and running again.