If we tour on our scheduled "off day" will they drop our fpp for later dates?

What would happen if we had 10 day tix for our 12 day stay, and we ended up going to the park on our scheduled “Off day”? Would they automatically drop our 11th day fpp? The reason I ask is I would prefer to drop tickets from, say, day 9, not 10, since 10 is Christmas. Make sense?

You can have FPs on as many days as you have tickets. If you want to keep your last day, cancel the day you will not be entering the park, and make your new FPs before you go.