diff --git a/app/controllers/admin/labs_controller.rb b/app/controllers/admin/labs_controller.rb
index 75985f0..b5b4c7f 100644
--- a/app/controllers/admin/labs_controller.rb
+++ b/app/controllers/admin/labs_controller.rb
@@ -10,7 +10,7 @@ class Admin::LabsController < OrbitMemberController
   before_action :allow_admin_only, :only => [:index, :setting]
 
   def index
-    @labs = Lab.order_by(:year=>'desc').page(params[:page]).per(10)
+    @labs = Lab.sort_year.page(params[:page]).per(10)
   end
 
   def new
diff --git a/app/controllers/personal_labs_controller.rb b/app/controllers/personal_labs_controller.rb
index e9ef0a2..743e571 100644
--- a/app/controllers/personal_labs_controller.rb
+++ b/app/controllers/personal_labs_controller.rb
@@ -1,6 +1,6 @@
 class PersonalLabsController < ApplicationController
   def index
-    labs = Lab.where(:is_hidden=>false).order_by(:year=>'desc').page(OrbitHelper.params[:page_no]).per(OrbitHelper.page_data_count)
+    labs = Lab.sort_for_frontend.page(OrbitHelper.params[:page_no]).per(OrbitHelper.page_data_count)
     lab_list = labs.collect do |lab|
       member = lab.member_profile
       path = OrbitHelper.url_to_plugin_show(member.to_param, 'member') rescue '#'
diff --git a/app/models/lab.rb b/app/models/lab.rb
index 8ddba7d..0ffd471 100644
--- a/app/models/lab.rb
+++ b/app/models/lab.rb
@@ -29,7 +29,9 @@ class Lab
 
   before_validation :add_http
 
-  scope :sort_for_frontend, ->{ where(:is_hidden=>false).order_by(:year => "desc") }
+  index({year: -1, _id: -1}, { unique: false, background: false })
+  scope :sort_year, ->{ order_by(:year => "desc", :id=>"desc") }
+  scope :sort_for_frontend, ->{ where(:is_hidden=>false).order_by(:year => "desc", :id=>"desc") }
 
   def get_plugin_data(fields_to_show)
     plugin_datas = []
diff --git a/app/views/plugin/personal_lab/_profile.html.erb b/app/views/plugin/personal_lab/_profile.html.erb
index 64518d8..27803c8 100644
--- a/app/views/plugin/personal_lab/_profile.html.erb
+++ b/app/views/plugin/personal_lab/_profile.html.erb
@@ -7,9 +7,9 @@
 
 <%
   if has_access?
-    @labs = Lab.where(member_profile_id: @member.id).desc(:year).page(params[:page]).per(10)
+    @labs = Lab.where(member_profile_id: @member.id).sort_year.page(params[:page]).per(10)
   else
-    @labs = Lab.where(is_hidden: false, member_profile_id: @member.id).desc(:year).page(params[:page]).per(10)
+    @labs = Lab.where(is_hidden: false, member_profile_id: @member.id).sort_year.page(params[:page]).per(10)
   end
 %>