What I hear from your responses is “expect the price to go up with next year’s contracts. We don’t want to honor the old price listed when you signed up months ahead of time.”
If you are sailing out of FLL, you should have options that may be cheaper than Disney. Your hotel will probably be within 15 minutes (often less) of the port. And probably no cute Disney buses, as they can’t be utilized for the resorts or other Disney functions, like the ones in Orlando. I expect it to be contracted, as is now the case in Orlando (?)