Bounding Box and Box planes

Hi all,

Let's say I have a box defined with params>box with the lower left corner at 0 and 100 on all sides.  If I use the Box Components module on it followed by the Plane components attached to P, I get the origin of the box plane as being at 0,0,0

If I have the same box in BRep, and I use the Bounding Box component, and plug that box through the same components as above, I get the origin of the plane of the Bounding box as mid-box (50,50,50)

Not that it matters really (as long as I know how it works) but I was mainly curious as to why the difference between how a box and a bounding box are defined...  Thx,  --Mitch