I have two 1-4 certs from Chase. I'm going to stay for four nights at a cat-4 hotel in September. When I book one night, it shows me the option to use a 1-4 cert. But when I book 2 or more nights, it shows only the option to use points. Do I need to make 3 reservations (1 night cert + 1 night cert + 2 nights with points) in order to use the two certs?