We all want to save money and still have fun this summer. So if you were browsing the web for cheaper rooms on a cruise and found and booked those tickets, you'd expect the cruise line to hold up its end of the bargain. Right? Well, not necessarily. Some people who booked on a Carnival Cruise Line ship got a wickedly awesome deal, only for the company to come back and say, "Oops... that was a mistake, we're cancelling your rooms."