Top view draggable orthographic Camera

I have some problems https://playground.babylonjs.com/#K9MWF6#13

Why does panning on the Z axis not work?

Why is Zoom in/out broken after enabling the orthographic mode?

Do I need to call the attachControl() method 2 times on the camera? In https://playground.babylonjs.com/#K9MWF6#3 its called twice.

This is supposed to be the top view so the Y axis is supposed to face up right? This is how Babylon works? On the other hand, in Blender this axis is represented by the Z axis?