title: Server triggers client event twice
body: <p>hi I'm trying to develop simple chat app using socket.io and express.</p>
  
  <p>My issue is: when user send message emit event to server and server broadcast to the rest clients- it happens twice 
  That is all what I can't figured out: why 
  socket.broadcast.emit('setMessage' fires twice in the browser setMessage</p>
  
  <p><a href="https://github.com/ntorbev/chat" rel="nofollow">https://github.com/ntorbev/chat</a></p>
  
  <p>any help will be appreciate </p>