firstly, i think they were 40 episodes for season 1 secondly they growed up they are adults now they cannot act like teens ari has THE CAREER and jenette also has moved in her life the rumors which have been speculated have not caused the entire cancellation so i guess blame adulthood for that lol
I think their are three reasons for this cancellation 1. Ariana grande wanted to act mais mature 2 ariana didn't want to play the stupid one 3 their was a problem with I. The company's budget