I have never even gotten extra FP after the initial 3, not even from a kiosk, so I'm not sure how this works. When is it you can book a 4th FP? After the initial time slot has passed--like if you have a FP for 10:20-11:20, you could book one at 10:20 like the old system? Or after you have used the FP? What if you end up not using it? Do you have to wait until the whole range of time has passed, for example 11:20?