You are most welcome! I guess a lot of group space had been reserved by agencies who couldn't sell it by the final payment date. So they either had to return it to inventory or eat the costs. I don't think RCCL was planning on so many cabins being dumped and they had little choice but to drop prices in order to fill the ship up (again).
Price drops are generally cruise-specific based on how well a particular sailing is selling. So the answer to your question is that this price drop is for the inaugural sailing only. BTW - I like Dale Jarrett too. In fact, I met his dad on our first cruise back in 1992. It was the Richard Petty farewell tour cruise. We had the whole Petty family and Ned along for the week. Really cool. They were all genuinely nice people.