This theme was adapted from Dayle Rees's excellent Mellow Contrast theme, which can be found on his github.
I wasn't very happy with the Atom port so I made my own with some minor changes.
If you like the feel, check out Dayle Rees's version (and others) at the repo linked above, they're really great!
Good catch. Let us know what about this package looks wrong to you, and we'll investigate right away.