In 2017 Disney adjusted the start time of its afternoon Magic Kingdom parade (Festival of Fantasy) to 2:00 PM on some dates and 3:00 PM on other dates.
Although they are subject to change, Disney releases parade schedules about six months in advance, and we adjust our data with the "official" times at that point.
Prior to six months out, we do not know exactly what time Disney will start the parade, so we make an educated guess when you add Festival of Fantasy to a Personalized Touring Plan. There is plenty of uncertainty that far out, and our predicted parade time should suffice for the sort of tentative planning that can take place 6+ months in advance.
If you do not want to use our predicted time, you are welcome to replace the Festival of Fantasy step with a "break" for the chunk of time that you plan to spend enjoying the parade. Just keep in mind that you'll need to adjust your break on your own if the parade time changes.