Hey !

I started playing the game and i really like it ! But i have to admit i'm a bit lost between that much missions stored in disorder (it's in alphabetical order so it's a bit confusing when i an't to play in historical order). Also, it looks like all the missions are made by the players and here's my question: whitch missions are made by the creators and whitch one is made by players ? How to recognize them ? Is there any form of lineup in those missions, like a campaign or else ?
Thank you for your answers ^^