Thanks!
The sprite sheet is organized vertically by animation to make it easy to see which animation is what. I have added animation labels in the past, but that was eventually deemed unnecessary. I also try to make the dimensions of the sprite sheet a base 2 number so if developers want to scale up the images, there's less of a chance they'll end up with mixels or blurring in the process. And, I try to limit the size of the sprite sheets out of respect for the developer's computer storage; This sometimes means sprites are a little cramped.
I've found that every game developer has their own way of doing things and there isn't an "industry standard" for sprite sheet organization. But, devs can easily organize the sprites in a way that makes the most sense to them and their project.
So to summarize, a lot of thought goes into making these sprite sheets as accessible to dev's as possible. I understand that some sprites are more intuitive than others, but if you have any specific questions or concerns about what sprite is what, feel free to email me: lightoutonfifth@gmail.com