My 180 day window opened this morning, and I was able to get exactly what I wanted for our 12 day trip, including Be Our Guest for dinner (it was open all 3 of the days I was considering), and Cinderella Royal Table for dinner.
I couldn't book anything other than my arrival day online, but when I called- everything was wide open. I should add that I called 7am, spent 45 minutes planning everything only to accidentally disconnect before giving my credit card (my fault- battery died), so I called back, and after being on hold 15 minutes, I got EVERYTHING I originally booked on the earlier call.