Maybe somebody wants to help ;).
I create closed curves (38- 0,1,0,0) and find 2 Points/Params (76- 0,1,0,0) on each of the curves. When I try to Shatter curves at given Parameters, instead of two curves per “curve” (76) I get up to 15 segments/curves (15- 0,0,0,0,1, totally 2176). It looks like it depends on the curve geometry. With some curves it works, but not with all the curves, that is why I believe that it has nothing to do with Graft of Flatten ;).
What I am doing wrong?