I have being trying to get the new particle interaction to work, and have not achieved it yet, so please help.

I open new Blender; delete the default cube; add two parallel planes in top view; move one 5 units up in front view; make the top plane the generator (static, z=-0.6,face on). The particles are seen to go down through the plane left at zero. I Make the zero plane a Deflection Plane (DP) (all left at zero); double the size of the zero plane.

Now when I go back to the particle plane (PP) and hit Recalc All the particles go up and about 1/10 of a unit. Any changes I make to the partilce system adds to the confusion. eg z=-9 and the particles go up even more, ie nowhere near the DP.

I then try rotating the DP 180deg to face the other way up and the partilces go downwards, straight through the DP

Can someone please say what I have got wrong.

Thanks.