[Koha] Item Statuses

[Jordan Barker]

Hi,

Does anyone know why the WITHDRAWN, LOST, NOT_LOAN, etc. statuses are
separated in the items tables? 
I can sort of understand for LOST & NOT_LOAN since they specify different
types of LOST & NOT_LOAN, but WITHDRAWN, DAMAGED, RESTRICTED just seem to be
true or false type statuses.

So I guess my real question is if I don't need to specify those different
types of LOST or NOT_LOAN, should I just add statuses like LOST or ON ORDER
to the NOT_LOAN Authorized Values and work from there?