Im currently able to book fastpasses for a trip in October as staying at Disney until 31st October, but it will only allow fast pass booking unto 28th October and anyway before including this month. Is this correct?
Others from the UK have reported this. You may want to call Disney IT to see if they will open the last 3 days of your trip for FPs. Or, your only other option will be to add on a day of FPs after you have used a day's worth.