"/" means "or". Category OR Industry. Nothing incorrect about listing furry as a category.
True, but in the URL, you'll see that the cons are listed in the trade show section of the site. Trade shows cater to specific profiteering industries, such as weddings, home construction, gaming, etc. They show off new products to sell to people in said industries like wedding planners, construction and gaming companies respectively. The general public may be welcome, but it's all business, not meant to be a weekend getaway like at a fur con. While there are artist alley areas of our conventions, you could hardly call the con itself a trade show and furry an industry to sell to. That's where I'm coming from about the original link.