We had an obc, not from a group but from Next Cruise, "fall off" when I tried to book a shore excursion. Booked and paid for it as it was a good price after I called and staff couldn't figure it out, though they told me to go to my ta! After I emailed mbayley@rcci.com. they apologized, found it, gave us some additional obc. It was an IT problem. Sound familiar.