Art,
Almost every field on the Stock Code Information window could be questioned as whether or not it should be part of the information that is cloned. As this is a per user preference, it is difficult to make a modification to Atrex that while satisfying someone, will cause an issue for someone else.
While the function will not be modified as requested, a suggestion has been added to the list to provide the ability for users to customize the fields included when cloning. No time line has been attached to when this might be implemented as this always depends upon the number or requests we receive for a modification.