I have a flight available on United in Mixed Cabin, its not showing as mixed cabin on AC, but when i do Multicity i am able to set it up at the higher rate of 100k until the passenger name page then the site crashes and give me a error code An error occurred and we were not able to complete the process. Please try again.(Error code: [36803]) I called an agent and she told me i am trying to cheat the system and i will have to book it as two seperate tickets.... is it true? or HUCA?