So if I have them transferred to KTTW, but don't use all the days (which we won't), will we have to have them removed from those cards before we leave, or just bring those old KTTW cards next trip and have them moved to new keys? Don't want to "lose" days! And I'm pretty sure Disney would re-print them, I just don't want to show up at RD at MK on the first day of our next trip and find out they don't work!