Adds only a single item with a given key to presence.

modules/xmpp/ChatRoom.js

         {
             case "nick":
                 if(!member.isFocus) {
-                    var displayName = !this.xmpp.options.displayJids
-                        ? member.nick : Strophe.getResourceFromJid(from);
+                    var displayName = this.xmpp.options.displayJids
+                        ? Strophe.getResourceFromJid(from) : member.nick;
 
                     if (displayName && displayName.length > 0) {
                         this.eventEmitter.emit(
                 this.phonePin = att.pin || null;
                 this.eventEmitter.emit(XMPPEvents.PHONE_NUMBER_CHANGED);
                 break;
-            default :
+            default:
                 this.processNode(node, from);
         }
     }
 
 ChatRoom.prototype.addToPresence = function (key, values) {
     values.tagName = key;
+    this.removeFromPresence(key);
+    this.presMap.nodes.push(values);
     this.presMap["nodes"].push(values);
 };