Problems with emitted Hair / Vertex Groups

hey guys,

i need help. I want to emit hair ( later objects ) from faces which i added to a vertex group before. My problem is that the hairs are never emited correctly.

In the first step, i added 8 faces to a vertex group. in the next step i want to emit 1 hair/face. i wonder why hairs are emited on a face which is not in the vertex group?



thx for your help