why should the DSM-IV-TR need both categories of Dissociative Amnesia and Dissociative Fugue

Answer 1

They are two different disorders.

http://my.clevelandclinic.org/disorders/dissociative_disorders/hic_dissociative_fugue.aspx

http://my.clevelandclinic.org/disorders/dissociative_disorders/hic_dissociative_amnesia.aspx

Answer 2

so maybe because the symptoms vary and the amount of episodes in inability to recall information

Answer 3

Do they respond to the same or different treatments?

Answer 4

dissociative fugue help the person come to terms with the stress or trauma that triggered the fugue

dissociative amnesia to relieve symptoms and control any problem behavior