awesome chapter smart kakashi.
maybe Kakashi and Tobi do NOT have the same jutsu. Both of their Jutsu go into the other dimension. So when Tobi becomes untouchable, he is going where Kakashi sends things with Kamui which is why he is able to be hit by the things Kakashi sends there such as the Kunai and Rasengan. The problem is Kakashi can only use Kamui 3 or 4 times a day and he already used it twice. and at the end what he means by it's only one jutsu is that his absorbing, teleporting, and untouchable is all ONE jutsu.