Board Thread:Theories and Speculation/@comment-24815383-20150827211945/@comment-6769189-20150831042456

Not a continuity error if it doesn't defy anything that has happened before. That just confirms that Orochimaru never ran into him when he had it.

Naruto didn't know about Asumas relation to Hiruzen and they lived in the same place for a very long time. Most people didn't know about Naruto being a jinchuriki either.