My assumption is there is an instance of stereo minds exploding... mine did too.
I've always been irritated with composers that use the notes E#, B#, Cb or Fb. I consider composers that use double flats and Double #s as people that simply want to confuse the average/ below average sight reader.
(I can imagine them sitting behind their desks giving out an evil chuckle every time they do it)
Spell a C# Major Seventh chord (C#Maj7) - C#, E#, G#, B#. There is no other way, evil chuckle or not.
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Fº7 = F, A♭, C♭, E♭♭
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Dbmin7 = D♭, F♭, A♭, C♭
D7(#9) = D, F#, A, C, E#
Bb7(b9) = B♭, D, F, A♭, C♭
EAug = E, G#, B#
I can go on…
These spellings are actually used to NOT confuse a music reader.