Joined curves seam in odd place

Hey all!
Can anyone tell me why the seam of this polyline made of V-shaped parts isn’t at the start of the first “V”?
Thanks a lot!
image


joined curves start seam.gh (15.2 KB)

No, but you can easily move it there using the Seam component.


joined_curves_start_seam_2020Mar5a.gh (15.0 KB)

Or at the midpoint of the ‘V’, if you prefer:


joined_curves_start_seam_2020Mar5b.gh (16.3 KB)