Since you mention Muunilist, it's probably a map of the Imperial Remnant. Naturally the Hutts are going to have more territory since they weren't losing so much territory to the Republic.
You might not say Kamino's beyond the Rishi Maze, but Dexter Jettster in the movie did. It wouldn't be the first time graphics and reference materials didn't support the movie dialogue or vice versa, though.
I don't think a greasy cafe owner of questionable background should be the definite source of cartographic information.