I think that the first prince is posing as the second prince, seeing that they both left at the same time maybe something unexpected happened when the second prince was trying to leave.
It was long but sooooo worth it! I loved every second while reading this! I didn't realize there were more chapters so I just finished and let me tell you it...THIS is a masterpiece! A MASTERPIECE!!!
This one is so great. Really love it, I was never bored.