You can work the system so that you get more at once, but its probably not the way your husband is thinking. If you get a FastPass for Mickey's Philharmagic for instance (the actual ride doesn't matter) that says to return between 10:30am and 11:30am, it will also say something to the effect of "You can get another pass at 10:35am". So even if you haven't used the Philharmagic FastPass yet, at 10:35am (since you technically could have used it by then) you're able to get another FastPass (for Buzz Lightyear for instance). Does that make sense?