A Jsondb data file in its entirety is not a valid JSON string, hence you cannot edit the complete Jsondb data file in a standard JSON conscious text editor. This makes it difficult to manully edit the file if the schema is complex.
However each row in a Jsondb data file (upto the LF) is expected to be a valid JSON document. This plugin when installed along with the Atom Editor can help to manually edit a Jsondb data file.
Note: MongoDB import files have a similar problem with manual editing, this plugin can be used for those files or any similar files
Packages > json-atom-plugin > Togglethis will add a extra sub pane to the right.
WIP: As of now the right pane is read only any changes made to it do not reflect back in the main document
Good catch. Let us know what about this package looks wrong to you, and we'll investigate right away.