This kind of stinks. I had an FP+ for 10pm-11pm, and I had to change the time before it would let me book Wishes, .,...which has a time marked 9:40-9:55.
After I booked wishes, it wouldn't let me book any FP+ after Wishes ...except for the Electrical Light Parade 10:40-11:00pom. I'm not even sure I want to bother with that parade. I booked it anyway since there's nothing else I can use it for (wont be arriving at MK until after dinner at Cali Grill)