Image Reset Problem Xcode

I was making an objective C Xcode project

All I have is a plane that goes up and down, based on which direction you swipe. This works fine. But then I decided to make a smoke trail behind the plane. By adding smoke images behind the plane every 0.1 or 0.2 seconds. But whenever a smoke image is added, The plane resets its position to what it was when the game started.

I'm using the most recent version of Xcode.