I just noticed because when I solved it I first instinctively put that name in...after a few secs I thought, strange there’s that famous guy with almost the same name...oh, duh!
No, your instincts are correct. When I post the solutions I go to https://www.quipqiup.com/ to get a “clean copy”, but I have to check, because it does things like that. (What you saw.) I was rushing just a bit this morning.
Not to belabor this, but either solution is a valid solution to the cryptogram. I generally google the quote and check when I am not sure. Your solution is correct, in that it identifies the correct author.