Karpath or Verigan's Map?

So out of anything in the series this is the one gaff that has bothered me the most. Really there is no way for it to be corrected. But in Part 16: A Beacon of Hope, Templar_Adaephon mention's that there is no hope of saving the world unless they had Karpath's map. Luckily they found part of it; and so their quest continued to find the other three pieces. All is fine and dandy. But after they recovered the second fragment in BBQ Bay in Part 25: Visions, suddenly Verigan appears as a spirit and tells the heroes quote, "Heroes! Time is short. You have found a piece of my map... and by touching it, I can communicate with you!" So now the map is Verigan's? What about Karpath? Now many may not care about such a small detail, and ever since then, they have made Verigan the main focus of the map from the rest of the series. But it is just a thing of consistency and for those that have never seen the series before, are a younger viewer, or are easily confused it may seem strange at first until they realize they are the same thing.

Now the Yogscast wiki tries to make it all fit by saying it is called Verigan's map but was written by Karpath.   It also says it is the path Verigan took into the desert during the Sand War. Now that makes the name switch more reasonable. Karpath documented the journey his father took, and named it after the great adventurer. Also, Verigan's ability to communicate through the map can be connected through his death and magic and also the fact that it was is journey. I really like this rationalization, and maybe I just didn't notice the connection like that. I think maybe that was something that needed to be explained a bit better in the series.