Hi, closed splines in RailClone are a bit special, because for some processes they are considered as closed, and other as open (with two vertices at start/end stacked).
In this case we didn't consider this possibility for the
Evenly rule, so spline is evaluated wrongly as open. I've added the bug in our to-do list.
I've attached a workaround for that. It uses a
Start segment to add the missing piece. I've added a
Transform node to change the X Alignment to
Center, because the
default alignment for Start segments is
Left.
The drawback of this workaround is that it works only with open splines. For this reason, i've added an Edit Spline modifier to "break" the initial vertex.
I hope that helps.