Data matching problem2

I am experiencing an issue with data matching. At least I think it is.

I want to create some sort of crystals out of a simple 2d lines. I want my Grasshopper definition to "convert" these lines into a sort of crystal shape, but without the solids, just a construction made of lines.

And I succeed in making this. But only for one line.
When I select "Set multiple Curves" the lines construction goes crazy.

I guess that has something to do with Data matching:

Any help with this?

Thank you.

crystals.gh

crystals.3dm