Agreed with Syag!
Is it normal? Its a neatness thing. Like I straighten out all my stuff on my desk at work just so. So, hey, if it makes him happy, shalom al yisrael!
My wife is very particular about ironing linens as well, so that it is neat and tidy. I used to think it’s weird, but I’ve absolutely no problem with that, and besides, all we end up having is a nice neat looking shelf.
Not such a bad problem to have! Is it normal? Who cares! We’re happy ….and neat!