[PD] Gem gemlist_info and gemlist_matrix

[Max]

dear list,

i'm wondering how the gemlist_info and gemlist_matrix objects work. gemlist_info for instance has a default position of x, y, z: 0, -2.38419e-07, -13.0551
which i found strange, so i thought i'd add a translateXYZ 0 2.38419e-07 13.0551 before the gemlist_info to get reset the position to zero. but then i get 7.30032, -10.4295, -10.1628
that seems very strange to me can someone enlighten me?
the gemlist_matrix-help seems very incomplete, it doesn't explain what difference of the matrix and the list is and what the output values $1…$15 are.

thanks,
m.