Board Thread:Naruto Discussions/@comment-28846843-20160625201600/@comment-4646462-20160625234708

BakumatsuWarrior wrote: Then he changed his mind as the story progressed because he was making shit up as the story progressed to a certain extent.

Narutopwnu7 wrote: he even admitted that in a interview once,he was just making things up as the story went on.

This is the explanation of every inconsistency in the story of Naruto, this included. It's important to have a solid foundation once you start a long-running series, as well as rules, settings, and events established that must be followed correctly to the end, and Kishimoto didn't do that. If he wrote the entire series in the background (similarly to a novel), everything early on in the series would be very, very different.