Bad business practices. They screwed up the reservation, were AWARE that the reservation was set for the wrong day, and not only refused to make accommodations, date changes, or refunds, but even refused to admit that they were at fault. And, after reading reviews from people who have stayed there, I feel like I dodged a bullet.
As of June 1 2015, JetBlue has began charging for all checked bags, including the first checked bag, on its lowest priced fares. All checked bags must not exceed 62 (157.48 cm) in overall dimensions (length + width + height) and cannot exceed 50 pounds (22.73 kg).
JetBlue customers can bring two items of carry-on baggage: one carry-on bag/suitcase, and one additional personal item, such as a purse, briefcase or laptop. Weight limits are not specified, but you must be able to place the item into the overhead bins or beneath the seat in front of you.