Delta was a big help in correcting Expedia's mistake. To not allow us to pick our seats, especially when I clearly have young children, and randomly place us all over the place was inexcusable. Aside from being on hold with Delta, they were very helpful. Expedia should be more aware and have the web site to which you book your flight not allow this to happen. Not sure I will use Expedia again. Rather just go through the airline and avoid the inconveniences.