I believe you can only do one Palo reservation for each (one dinner, one brunch, one high tea). You then can be put on a cancellation/wait list. I'm pretty sure this is how it works but hope someone will verify!
That is exactly how it worked for our 7 day in January. We were second in line and were able to get whatever we wanted, but couldn't reserve more than one of anything.
GET UP TO A $1000 SHIPBOARD CREDIT AND AN EXCLUSIVE GIFT!
If you make your Disney Cruise Line reservation with Dreams Unlimited Travel you’ll receive these incredible shipboard credits to spend on your cruise!