initalise lastread marker to last line initially fetched from server

js/models.js

@@ -23,7 +23,7 @@ models.service('models', ['$rootScope', '$filter', function($rootScope, $filter)
         var active = false
         var notification = 0 
         var unread = 0
-        var lastSeen = -2
+        var lastSeen = -1
         var serverSortKey = fullName.replace(/^irc.server.(\w+)/, "irc.$1");
 
         var indent = function(predicate) {

js/websockets.js

@@ -30,6 +30,10 @@ weechat.factory('handlers', ['$rootScope', 'models', 'plugins', function($rootSc
             message = plugins.PluginManager.contentForMessage(message, $rootScope.visible);
             buffer.addLine(message);
 
+            if (initial) {
+                buffer.lastSeen++;
+            }
+
             if (buffer.active) {
                 $rootScope.scrollToBottom();
             }