Project point onto surface

Hi,

I have a set of coordinate system (centroid of a polygon) which sits at elevation 0, i would like to project in the 2 bsplinecurve that i created.. I've tried every technique but everytime i would only get a number of points projected not everything. I'm not sure whats happening. 

I've already tried ProjectOntoSurface, DirectionSurfaceIntersection, CurveSurfaceIntersection and so on. I've also tried changing the replication to all combinations but i would only get random points.

I'm using the latest GC version.

I've attached the files below:

GC Practice.zip

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