At WDW, you can't use another "day" during the same day. For example, I go in on Monday, but forget to get stamped and can't get in, I can't use another day even if I have extra days left. Also, if I get a non-hopper, I can't use one day of the pass to go to one park and then use another day to go into a different park on the same day.
Is it the same at DLR?
Is it the same at DLR?