User blog comment:Nick D Wolfwood/inconsistencies in the world of Bleach/@comment-44061-20100701151405

We know Kubo writes on the fly some of the stuff he has stated previously he seems to hold onto for later so with the two points you bring up it maybe that Kazeshini isn't necessarily dual blade which is fine so what yamamoto said previously could hold true. As for what Ulquiorra said that too maybe true. Technically being 0 Yammy is outside the common number ranking system. As you mention his unique position of gaining power may preclude him from the rule or line up but then again Grimmjow broke the rule as well with the release of the Gran Rey Cero and it didn't destroy the dome of las noches, so the rule seems stupid as both have happened under the dome with no consequence. The aizen thing i can't figure out. Best guess is that his friends are just as special as Orihime, and chad but haven't realized it yet. But noticeably the way reiatsu has been portrayed with most characters especially Aizen has been more so inconsistent then mostly anything in bleach.