How to rotate X axis on Spline BP?

I’ve created a track spline using the BP setup below. The middle commented section allows me to roll spline points (X axis). BUT when I roll a point in the Editor near the start of the Spline BP, a spline point 2 steps back rotates. This is amplified, so that around halfway along the Spline BP, rotating a spline rotates a spline point 5 steps back, and near the end of the mesh it rotates one 7 steps back.

What am I doing wrong?

After reading up some more on this (link below), it appears that the X axis cannot be rotated on splines. The rotation effect that I’m getting, which appears to be on the X axis, is possibly on the Y/Z axis instead but appears to be on X due to rotation applied on axes at that spline point.