Forum Post: Question about point group

Dear all,

I'd like to build a dam by point group,

first of all, I need to build every center line of the dam in each elevation.

so I plan to draw a series of points, and then connect them by BSplineCurves

By these curves I can build an arc dam...

but problem is, the point group I made doesn't follow the order I want them to be,

I want them to be Point[0][0],Point[0][1]...Point[0][100] in same elevation, but the point I draw is Point[0][0],Point[1][0],...Point[100][0] in same elevation.

I wonder to know what's wrong with my script? and how to fix it, 

Thank you!

the Scripts and excel data are in the attachment, fyr.