If you book the same cabin you should have no problems at all. All you should have to do is go check in with immigration (usually after everyone else has left the ship) and then back to the and wait for the next leg to get on (took us less than 15 minutes). They should leave your new Seapass card and instructions for the check in for the second leg in yor room before the first leg is over. It's really neat to basically have the ship to yourself for that short period of time. Enjoy!
Celebrity Eclipse March 5, 2011
Serenade of the Seas Oct 23, 2011