NFS Carbon

I need to know about why the mystery city was taken out of the game. Why were the mystery islands never told about? Why did you make the data, but keep it in the game when you made the new data? Is it possible to get there? I found a glitch that lets me go to the canyons, san Juan, lookout point, and the drift course, but when I get to mystery city, it vanishes. ?????? Why? look up videos on YouTube. you will see what I mean.