Well, obviously? Any two tasks are different from each other. The point of general stats/categories are a) to acknowledge that there are similarities in skills that make some tasks easier than others and b) to simplify something as complex as "ability" using gaming taxonomy. Skill specialization within an arbitrary category can be handled in a couple ways, including traits, built in bonuses/maluses decided by situation, or subcategories.The skill set of running a nation or even a bureaucracy within a nation is distinct from the skill set of, say, running an inn very well. Both the world's best innkeeper and Tywin Lannister are high-Stewardship characters, but their skill specialization is not the same, and not just because one is better at handling money in the strict sense than the other.
So, regarding trade and administration, I suppose the question is whether the difference between money/goods/transport stewardship and organizational stewardship is enough that it justifies splitting the category, as opposed to another solution. If so, fair enough, as that judgement is dependant on the QMs decision making process.
Again, there are indeed differences, but are they sufficiently different to be worth altering taxonomy over? Organizing things fits well enough under stewardship, and insuring an army is well motivated would be martial/warcraft. I still struggle to imagine why the need for a specific leadership skill category. Again, maybe the difference will come up often enough to render my argument moot, but I haven't seen evidence for that just yet.There's a Venn diagram overlap between leadership (in the sense of 'can manage a large organization well') and generalship ('can handle and sustain armies well'), but they are not the same. Leadership and charisma are pretty strongly separate, because being good at personally charming people isn't remotely the same as being good at running an organization.