Opened Curve - Type Labelled Closed

I was wondering if someone could tell my why the open curve in this file is ‘labeled/described’ closed in: Properties > Object > Type section?
Open_Curve_is_Closed.3dm (43.0 KB)

Hello - the curve is basically duplicated and joined to itself- explode it to see all the pieces.



Thanks for pointing that out.
Now I know why, I accidently imported the same iges file object twice to the same layer.
And because each seperate profile was compose of 4 segments each when I did a join command it also connected the ‘double’ profiles too.
Makes sense now.