CGAL users discussion list

I am trying to use CGAL in some program. I tried to compute simple example to 
understand structure of the results which CGAL gives. This example was 
Delaunay triangulation of pyramid with vertices
  1  0  0
  0  1  0
 -1  0  0
  0 -1  0
  0  0  1  .

CGAL has given results

5
  0  0  1
 -1  0  0
  0  1  0
  1  0  0
  0 -1  0
8
  0 1 3 4
  3 2 1 0
  2 1 0 5
  5 1 0 4
  5 0 3 4
  1 5 3 4
  1 2 3 5
  2 0 3 5

The list of cells created by CGAL contains six various indices (0..5) into  
list of vertices. But the list of vertices contains only five vertices. I 
don’t understand correspondence between the indices and the vertices. 

The list of vertices contains vertices in different order than is the order 
in which I inserted them into list of points from which triangulation is 
constructed. I don’t know if I have made some mistake during insertion of 
vertices into the list or the different order has some meaning. 

Arnost Vecerka