YAML Sortkey is an atom package that not only automatically validates your YAML files while you develop, but also gives you the option to automatically sort the keys on file save.
Full Demo: https://www.youtube.com/watch?v=s-GNDcK0Nq0
Yaml Sortkey: Validate
Yaml Sortkey: Sort Keys
Good catch. Let us know what about this package looks wrong to you, and we'll investigate right away.