Problem in the end of spiral

[JP-Mike]

Hi All
I can’t seem to understand why the orientation of the list is changing and how I can fix this issue.
how to make the end clear like the base ?
Any Help !

Param-01.gh (9.8 KB)

[HS_Kim]

Param-01_re.gh (16.4 KB)

[JP-Mike]

Thanks A Lot !