Websocket-Rails duplicate messages

gistfile1.json

[["client_connected",{"id":null,"channel":null,"user_id":null,"data":{"connection_id":"ac42958a66e6682a07d7","user_id":1},"success":null,"result":null,"token":null,"server_token":null}]]
["websocket_rails.subscribe",{"id":119155,"data":{"channel":"unit_channel"}}]
[["websocket_rails.channel_token",{"id":null,"channel":"unit_channel","user_id":null,"data":{"token":"a37d1c7d-73ef-4070-983c-384d9ac10fe4"},"success":null,"result":null,"token":null,"server_token":null}]]
[["websocket_rails.subscribe",{"id":119155,"channel":null,"user_id":null,"data":{"channel":"unit_channel","success":"Channel authorization successful."},"success":true,"result":null,"token":null,"server_token":null}]]
[["websocket_rails.channel_token",{"id":null,"channel":"unit_channel","user_id":null,"data":{"token":"57b0fc35-bb50-4acc-a547-79e4b87a8690"},"success":null,"result":null,"token":null,"server_token":null}]]
[["websocket_rails.subscribe",{"id":119155,"channel":null,"user_id":null,"data":null,"success":true,"result":null,"token":null,"server_token":null}]]
[["websocket_rails.ping",{"id":null,"channel":null,"user_id":null,"data":{},"success":null,"result":null,"token":null,"server_token":null}]]

gistfile2.rb

# config/initializers/hook_websocket_rails.rb

module WebsocketRails
  class InternalEvents
    def self.events
      Proc.new do
        namespace :websocket_rails do
          subscribe :pong, :to => InternalController, :with_method => :do_pong
          subscribe :unsubscribe, :to => InternalController, :with_method => :unsubscribe_to_channel
        end
      end
    end
  end
end

gistfile3.json

[["client_connected",{"id":null,"channel":null,"user_id":null,"data":{"connection_id":"8ee29fcdc6b61f8a3bf2","user_id":1},"success":null,"result":null,"token":null,"server_token":null}]]
["websocket_rails.subscribe",{"id":111272,"data":{"channel":"unit_channel"}}]
[["websocket_rails.channel_token",{"id":null,"channel":"unit_channel","user_id":null,"data":{"token":"32b813e3-db02-458c-8418-1535f2c94c69"},"success":null,"result":null,"token":null,"server_token":null}]]
[["websocket_rails.subscribe",{"id":111272,"channel":null,"user_id":null,"data":null,"success":true,"result":null,"token":null,"server_token":null}]]
[["websocket_rails.ping",{"id":null,"channel":null,"user_id":null,"data":{},"success":null,"result":null,"token":null,"server_token":null}]]

gistfile4.rb

    def make_private
      unless is_private? && !config.keep_subscribers_when_private?
        @subscribers.clear
      end
      @private = true
    end