Subcategories 

I removed the category, "Scientific societies," because "Botanical societies" is a subcategory of Scientific Societies. You should just put it in the most specific, or lowest level category, and it captures the higher level categories.

Here's the Botanical societies page, and you can see in its categories that it is in the Scientific societies categories.

Yes, it would be nice if people waited a bit longer before editing the article while you are obviously still editing it, or just started it.