I've had the same problem with some figures, especially the Millenium ones like Victoria 3 and Michael 3. I never found an explanation or a real solution, but I have an annoying workaround:

I rename all the 'Twist' parameters to something else, and make my scripts use that new parameter name (I use 'Twost'). What's annoying about this is that I can't do the renaming from a Python script. I have to go in and manually rename every Twist parameter. I now keep pre-Twosted figures in my library.