You'll want to call Disney's Magical Express right away at 866-599-0951 to verify that they have all of your correct flight information. Press option "0". They'll need your resort confirmation number and flight arrival / departure information. You'll still be able to have Magical Express retrieve your luggage, just be sure to hold on to your claim tags. You'll give those to the Magical Express counter when you arrive and they'll use those to locate your luggage.