If your ticket expires, the options expire with it. If your ticket does not expire, then the options, even if you have no park days left, do not expire. We just used a Plus/option from a ticket purchased a couple of years ago to go to a water park on a day we did not go to a theme park.
Think of the park days and the Pluses as separate things - they are handled differently.
Park days - each day you enter a park, you use up a park day from your ticket. If you have a Hopper, you can enter as many of the 4 parks as you like and only use 1 day of the park days. If you do not have a Hopper, you can only go to one park per day - you cannot use 2 park-days from your ticket to go to 2 different parks on teh same day.
Plus/Options - You have a certain number of these on your ticket if you purchased this option. They are good at PI, BB, TL, DQ, and Wide World of Sports. If you go to BB in the morning, DQ in the afternoon, and PI at night all in one day, you will use 3 of your options. If you spend the morning at MK and the afternoon at BB, you will use one park day and one Plus/option.
Hope that helps!
