Don't know why your date was cancelled, but saw on another board the following were also cancelled due to a change in the scheduled dry dock:
Voyage Number 3843 Dep. Ft. Lauderdale Dec. 7, 2008
Voyage Number 3844 Dep. Ft. Lauderdale Dec. 14, 2008
Yes, Gordon, being retired gives you the flexibility to take advantage of a cheaper fare.
You'll get to cruise sooner!
When you're retired, every day is Saturday!