Attractor curve definition fails with 3 curves but works with 1 and 2..

Hi there,

I built a definition to create a wave-like facade by attracting points on the facade to a curve. This works fine with one and two attractor curves but as soon as I try it with three (or more) the third curve doesn't do anything with the curves on the facade...

I appreciate any hints. Please find files attached! Thanks a lot!