Sorry for bringing this thread back but has anyone been successfull actually assigning seats on UA flights via CO.com. I have a split UA/CO reservation for me and my family. On CO.com I was able to assign Exit rows for everyone on the CO flight and then E+ on UA for everyone as well. However, after I confirmed it said something like "United seat assignments may take extra time to confirm". Well several days later we still don't have UA seats. It's for October so I haven't bothered calling yet or pulling it up on .bomb