How to stop scenes from auto playing

I am old and new to Articulate Storyline 360 and I want the student to have to use the next and previous buttons provided by articulate to move between the scenes.  I set up triggers that state when the user clicks or swipes on the next go to the next scene.  For previous clicks or swipes on previous go to the previous scene.  However when I publish it as soon as the player gets to the end it just jumps to the next scene.  What did I do wrong?