A job template's tasks could be set up when the template was made, but More › Edit showed none of them, so a task's due date couldn't be changed later.
Edit now lists the template's tasks with their order and when each one is due. Edit on a task changes it, the arrows move it up or down, and Remove takes it off. Save the template and new jobs made from it get the tasks as they are now.
Jobs already made from the template keep the tasks and due dates they were given.