You can insert an Organization Chart by clicking Insert > Diagram > Organization Chart. You will though realize that if the shapes are in incorrect order, you cannot reposition or reorder the shapes in the organization chart while AutoLayout is on. Here's one simple and neat trick to reorder the shapes.
Lets say you have 3 subordinates, 1, 2 and 3.
What you want to achieve is to reorder the subordinates in such a way so that it becomes 2, 3 and 1.
To achieve this, select subordinate 1 and drag it onto any of its co workers (either 2 or 3) so that subordinate 1 is under one of them.
Now, drag subordinate 1 onto the superior (the one at the highest).
The order will now become 2, 3 and 1.