The Fastpass system is programmable with no less than four layers of computers. When a layer fails, the system will default in favor of Guests. However, the settings as they stand today, allow you to get your next Fastpass when the one you are holding becomes valid or two hours later, whichever comes first. Common mistakes are:
1. Obtaining a Fastpass when there is no wait at the attraction locking you out of the next one. The length of the lockout time varies, however the time you may get another Fastpass is normally printed at the bottom of the ticket. If there is no time you may not be locked out due to system problems.
2. Look at the return time clock above the distribution turnstiles--If the return time is after you will be leaving the park for the day and you get a Fastpass, you may be locked out from getting your next one for up to two hours.
3. Getting the wrong Fastpass--Usually at Big Thunder Mt. and Splash Mt. since the distribution turnstiles are so close together.
4. Ticket becomes demagnitized because it came in close proximity to a magnet (like the clasp of a purse) or a cell phone battery. It then will not work in the machines.
5. Guests showing up early for their return time hoping they will be let in. They won't.
6. Believing the information on the attached link above titled "More FastPasses More Often". This was written when there were locations that were programmed to "waive" the Fastpass rule. Don't waste you time trying to get a Fastpass every hour. It states on your Fastpass, at the bottom, when you may get your next one. There is no "Magic Hour". There is no "Five Minute Surcharge".
7. A predetermined number of Fastpasses are distributed each day. Once they are gone, the location closes. The time it closes is based on demand and is not predetermined.
8. Any variations to the above information is usually the result of system problems or testing that is conducted from time to time. The Fastpass rule is no longer waived at Jungle Cruise and Haunted Mansion.
9. This information applies only to the WDW Fastpass system.