Currently, when the original poster of the question votes to close a question, the close vote is attributed to the Community user, which can lead to confusion on who actually voted to close the question.
Yes, it does say that the question author authorized a pending duplicate vote and whatnot, but that isn't indicated anywhere except for in a hidden thing that most won't look to see.
Like nicael says here, there really isn't a point to hiding that the question author approved a duplicate vote. Even if they didn't at the most specific level vote to close, it's makes for a better user experience to have something more like this: