Battlefront Bespin DLC

Why does the maps load in the same order when playing sabotage, don't always get long so end up playing the same map over and over.......and.......I select sabotage which then turns into turning point, if I wanted to play that I would select that, so when I the leave game and choose sabotage again....u guessed it I'm back at the same map.....quite frustrating and disappointing.