Did all members from Organization XIII die?

starts at thirteen then drops to two

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In kingdom hearts 2, there are just 13 members they mention. In kingdom hearts 358/2 days there are 14 members:

1-Xemnas

2-Xibar

3-Xaldin

4-Vexen

5-Lexaeus

6-Zexion

7-Saix

8-Axel

9-Demyx

10-Luxord

11-Marluxia

12-Larxine

13-Roxas

14-Xion