Ino doesn't wear a headband, if I remember it.
She does on her waist, I think, or arm. Many characters wear their headbands in a different style. It's just more common to see it on a forehead.
Kakashi killed Rin? WTF? I think thats the most common reaction here I guess. But that could be someone else.
Anyway, you are probably misunderstand what Tobi said before he took Nagato eyes:
He says he is the third of the six poths, but he refers to the Uzumaki Clan, check what he said before in that chapter:
Going by what Tobi said, "there were those who couldn't control Hashirama's power and boaster only an incomplete form of Izanagi", perhaps the same goes for these ancient Uchihas who have an even more incomplete Izanagi than Danzou. Wouldn't it be weird that Izanagi requires Senju DNA, but Izanami don't?