The Plein jeu V

Hello
Maybe I missed something but it seems to my ears that there is a problem with the Plein jeu V

Even if there are few harmonic differences it seems like the basic first octave is repeated on all the keyboard

F1 to E1 is correct then F2 starts the same up to E2

some of the pipes follow the tune but he general mixture does not work properly

The result is a very strange behaviour (except if we want to have the same  distribution than on certain old organs)