Well, I too have this same issue! I decided to bring a few keys along with me for further assistance...
Here, on the last image, it does not show the scissors in action. They are open around the vectors, but they do not cut the vectors of the circle.
This was a YouTube Video idea I'm trying to recreate (Ying-Yang Tea Lights) for my wife.
I don't think I need to upload a CRV file as a zip, since all this is is just 5 simple circles joined in close proximity to each other.