The editor is definitely hell, well said!
The props moving on their own could be one of two things which I’ve noticed.
There’s been an issue with the editor where when you ‘drop’ a prop it sometimes shifts just a tiny bit on its own, like it’s snapping to coordinates in an unseen grid. This can make it difficult to have perfectly smooth custom roads.
Eventlab 2.0 seems to have a brand new bug where the props will slide around as if being pulled by magnets while you’re trying to align them. They should not be doing this. I’ve made a post about it here.