Surface test misses many particles

[Fabrice]

Can you post the file? Something else is off then.

Well, preparing the example scene to send Max crashed
and after a restart...everything was absolutly normal. I guess it was just jammed...
Anyway the inside/outside selection works perfectly now

My problem now is that at each frame the particles are "jumping" to different places along the surface
Is it possible to make them allways be born at the same place?

(so I wont have this "jittering" effect accross the animation)