It is possible to insert more than one alignment point on a drawing.
If you insert more than one alignment point, every alignment point inserted after the first will also have an area associated with it. All of the devices that are in that area are associated with the alignment point in that area. Any device that is not in an area is associated with the first alignment point in the drawing.
In the example below, the arrows point from the fixtures to the alignment point that is used for them.