Location hierarchy updates

Hi,

Looking at the Locations table on Demantra, I see that there are multiple records for the same ship-to location and questions I have are:

a) On Ship To location, we have attributes like Region, to which the ship to belongs and the same is used on Demantra.

b) When the ship to location is updated with a new region value say from A to B, what is the expected behavior on DM?  Will it insert a new record in location table with Ship-to -B or will it update the already existing record

   Shipto-A to ShipTo-B

c) The requirement is that, when region is updated on ship-to to B, we ideally want all the past data and upcoming sales to be shown againist Shipto-B.