diff --git a/lib/realtime.js b/lib/realtime.js
index 361bbf0..e03e2d0 100644
--- a/lib/realtime.js
+++ b/lib/realtime.js
@@ -709,7 +709,7 @@ function connection (socket) {
       return failConnection(404, 'note id not found', socket)
     }
 
-    if (isDuplicatedInSocketQueue(socket, connectionSocketQueue)) return
+    if (isDuplicatedInSocketQueue(connectionSocketQueue, socket)) return
 
     // store noteId in this socket session
     socket.noteId = noteId
@@ -723,8 +723,8 @@ function connection (socket) {
       var maxrandomcount = 10
       var found = false
       do {
-        Object.keys(notes[noteId].users).forEach(function (user) {
-          if (user.color === color) {
+        Object.keys(notes[noteId].users).forEach(function (userId) {
+          if (notes[noteId].users[userId].color === color) {
             found = true
           }
         })