From your description and your screenshot I can provide you with a little more information regarding this issue. An orthographic camera, by design, works with angles that essentially flatten the image that they are viewing.
By trying to force, a seemingly perspective view, on an orthographic camera you are trying to ask the camera to calculate in a way it was never designed to do.
If you would provide more clarification as to what you are trying to use by using the orthographic camera specifically I will try and assist you further.
You could use a perspective camera and this should work as you would intend.