I think the question was if someone had a two day ticket and was only going to be there one day, could she use a ticket for one park, which would count as one day, and if she wanted to go to another park on the same day, use the next day's ticket. So if she had a two day ticket, could she use both days on the same day and then have no ticket for the second day.
Is this right? I don't know the answer, but I would think it would be much cheaper to have the hopper for the day.