Stroke alignment effects the transformation size of objects
It's a bit late (20 years) for this to raise it's head but when a rectangle is stroked, the transform size changesd depending on the type of alignment stroke.
For instance, using an 0.35mm stroke 200 x200 rectangle, the transform shows dimension with outside alignment 200x200, inside alignment 200.35x200.35, outside alignment 200.7x200.7.
When you use the rectangle tool and option click, type in 200x200, the rectangle is 200.35x200.35 if the center aligned stroke is used.
This proble is further compounded when you try to align a stroked line (stroke alignment centre is the only option) to a outside alignment stroked rectangle.
Look forward to your suggestions
Ron