Kishi will explain how he did that, don't worry.
sasuke is not very fast but he is fast
If he is very fast then he would save kakashi from madara but as you see sasuke arrived too late which means sasuke's speed is normal
They are faster Ninja to
I thought Obito only had problems making himself intangible, not going to another dimension. Unless I read it wrong and Madara has some shit up his sleeves.
he coulden't let things slip through him