I did the same thing. I got 4 certs to use now and they all 4 expire end of Feb 2014. Then in Mar 2014, I will get 4 more that expire 1 year later.

Important to note that you don't have to stay in room suite before the expiration dates...you only have to use them before the expiration date. ie. purchase the room using the certs before they expire, but the date of your stay can be later.....