We stayed at both CN and CSS, CSS is our favorite hands down. As long as you are physically fit enough for the stairs (we stayed in a One Bedroom Ocean Suite and there were 120 steps from our second floor room to the beach), you will love CSS!! Very romantic and you cannot beat the staff there!
They may have told you that you couldn't switch because CN is fully booked. We were able to switch from CSA to CN the day we got there but neither resort was full.
Becky & Dave
CSS July 2012 (Wedding @ CSS 7.18.12)
CN July 2012