Certain notes whose spelling cannot be changes
has anybody ever used these notes in their composition: E double sharp, B double sharp, C double flat and F double flat? Musescore cannot change the spelling of these notes I have mentioned.
In my opinion, you should not use these notes ever. I have only seen B double sharp in one piece of music by Grützmacher and I would never have composed like that.
So you should avoid these four notes in general and even look after them when you transpose a piece of music. This occurs very seldom, but it cann occur.