Why does Olan allow spins on non-vertical down lines?
By default, Olan allows illegal roll combinations so that you have a better graphical feedback as well as extended 4-minute freestyle options. Use Tools->Options in the menu and turn off “Allow non-FAI figures” to disallow it. This will, however, produce a lot of “red x” figures whenever the input of the left panel is not stictly legal, and it is much harder to design a sequence without in-between illegal figures, so I recommend to leave this option on.
