Use the Task Mode field of task 6 to change it to be automatically scheduled. This time, task 6 was rescheduled to start later. Why did this happen? Recall the dependency between the two summary tasks. The dependency said, in effect, that the Public Launch Phase should start when the Planning Phase was finished. However, because task 6 and the other subtasks of the Public Launch Phase were manually scheduled, Project did not reschedule the subtasks to account for this dependency. As soon as you set task 6 to automatic scheduling, Project also adjusted the start date of its summary. The remaining subtasks 7 and 8 are still manually scheduled, so Project did not reschedule them