Bug? Sub-machines with embedded elements

[dbJav]

If on a state machine diagram, I create a sub-machine then "Insert an Embedded Element" to it, let's say ExitPoint1, then I expect to be able to drag and drop that exit point in the diagram which is attached to the sub-machine. But this clearly does not work.  The exit point would show only if I first drag the sub-machine element into the diagram that is attached to it !

The element type for an "Embedded Element" such as Exit Point or Entry Point should be the same as for an "Entry" or "Exit" element as available from the Palette.  The difference should only be a matter of presentation in diagrams (depending on the context).

Why does EA handle these two things as two different types of elements ?  Normal behavior or bug ?

D