karamba: irregular structure

Hi!

Can someone explain my the load distribution in this example?

http://www.karamba3d.com/shape-optimization-with-galapagos-v/

The load is being divided though the number of points from the upper grid (logical),

but then the its being duplicated by the number of all points of definitions elements and fed as a vectors to the PLoad component. 

I would have not duplicated it and only fed is as vectors from the grid to PLoad. Why was it done as it was done? From my understanding it doesn't seem logical, but maybe I don't understand PLoad correctly.... ?

Thanks a lot,

Christian