For once Wiki has the link that I need. In the chapter release, Madara is referred to as the mizukage. However, in the volume release corrects it by saying former mizukage.
Wiki bibliography link for chapter release under volume release ( not one manga ). for the time being
Kishimoto, Masashi (2008). "Chapter 404". Naruto, Volume 44. Shueisha
Yes mistakes are made.
Or heck, just put the following into the yahoo search engine.
volume 44 naruto "former mizukage"
and see how many pages of different forums confirming what I said about mistake. Granted they say WSJ, I say kishi. My other forum says kishi mistake. Essentially, volume release overrides chapter release.