Absent from your question is the author [1]. The owners may have the legal right to edit and distribute the text, but by passing it off as Roald Dahl's words, they are perpetrating fraud against their readers.
And even if it were the author doing it, it would be dishonest to have multiple versions under the same title, unless there was a note at least briefly mentioning alterations.
Can I rewrite any book as I want and for any cries just say "Hey! I printed an original version! The whole 10 copies! Locked in the bottom of a locked filing cabinet stuck in a disused lavatory with a sign on the door saying 'Beware of The Leopard'?
Actually, your comment sparked a new thought for me. What if this (two concurrently published versions of the books) is purely an emergent property of our increasingly bifurcating society?
And even if it were the author doing it, it would be dishonest to have multiple versions under the same title, unless there was a note at least briefly mentioning alterations.
[1] https://news.ycombinator.com/item?id=35017707