Tell your TA that the air arrangements are unacceptable, and that you expect to get what the
DCL brochure promises.
The 2001-2002 DCL brochure also says that if you're using the
Disney Cruise Vacations Air Program from Denver, a "complimetary overnight hotel accommodations will be provided in a non-Disney resort."
Somebody may have thought they were doing you a favor by letting you remain in Denver through Friday. Or the daytime flights on Friday were fully booked because Saturday, March 23, is the start of Spring break for many midwestern schools, and lots of us are heading to Florida on Friday, March 22. But that's the Disney flight arranger's problem, not your problem.
In your message, you wrote, "it clearly states in the brochure that you are supposed to leave the day BEFORE the cruise, obviously to avoid any possible delays, missed flights, worries, etc." Actually, that's not the reason. From most eastern and midwestern cities, you fly on the the morning of your cruise, even though there's an obvious risk of missing the ship. From the western and mountain states, you fly the prior day because otherwise flight schedules won't get you to Orlando in time. So it's really not a matter of avoiding delays, it's just a matter of flight schedules.
You shouldn't have to deal with a sleepless night before you embark on your Disney Cruise. How awful!
Politely and firmly insist that they honor their written promise of a flight on the day prior to sailing and a complimentary "non-Disney resort" hotel room that night. If they say that's impossible because all coach seats from Denver to Orlando are full, or they have contracts with specific airlines, tell them to put you in first class or onto a different airline, or whatever it takes to get you into Orlando on the day prior to sailing.
Good luck! (I have to believe you'll be successful in getting this resolved quickly.)
I'll see you on the Disney Magic on March 23!