@flannan a bit late, but that hand sign stuff, there's the simple "she's moving her fingers and it just got a transition point" answer, but if she actually stopped her hands like that she'd actually only need 1 extra full finger on her right hand...while it is a rare condition, it is far from unheard of, formally called polydactyly, where a person has extra finger(s) toe(s) and/or parts there of...personally, I knew a kid in elementary school who had a split thumb, not a full extra finger, but split just past the knuckle, with both having separate nails, though when he got older he had part of if surgically removed because it got in the way too often