Elixir Log Files - how to log info only?

Hello, when I use this for logging in the error.log file I get only error logs but in the info file there are both info and error logs. How can I make it log only info?

config :logger,
  backends: [{LoggerFileBackend, :info},
             {LoggerFileBackend, :error}]

config :logger, :info,
  path: "/path/to/info.log",
  level: :info

config :logger, :error,
  path: "/path/to/error.log",
  level: :error