It appears that assigning a resource to several subtasks in WBS gantt chart leads to a schedule where the resource is easily over-subscribed.
For example, let us say give Alice all 4 subtasks of Issue#42. Each subtask takes 1 day. WBS gantt then decides that Issue#42 will take a total of 1 day. Obviously, the answer should have been 4 days (since Alice cannot time travel)
How do I configure the tool to do the right thing?