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Spline Generated Mesh can't handle loops and other weirdness

I have a BluePrint construction script that generates a track along a spline. I first built my own, then tinkered with another ( https://forums.unrealengine.com/showthread.php?62187-Pipe-Generation-System ) and then tested the Epic track tutorial ( https://www.youtube.com/watch?v=wR0fH6O9jD8 ) files. I’ve been attempting to make a track that can make vertical 90 degree turns, loops, etc. But when ever I try I get really weird twists in the track. In the attached image youll see a very simple spline and these gaps. Has anyone discovered a solution to this error?

Hoping to figure it out soon. Thanks for any help.