Currently when I create a sub task I am offered suggestions on what sub task I want to add. If I choose one of those sub tasks it places the existing sub task (that another user has created) in my parent task as well as keeping it in the original parent task. It is similar to having a parent task in many folders, you can add the sub task to many parent tasks.
This can create confusion as any change to the sub task, changes the sub task everywhere. Some of our colleagues have added a sub task to their parent task by mistake and have then deleted it, not knowing the implications of this.
It would be great to be able to turn off this auto complete function when creating a sub task.