user dup

app/controllers/projects_controller.rb

@@ -662,7 +662,10 @@ class ProjectsController < ApplicationController
 
   def sort_project_members project, members
     #userGrade = UserGrade.where(:project_id => project.id)
-    users = UserGrade.where(:project_id => project.id).order('grade DESC').joins("LEFT JOIN users ON users.id = user_grades.id")
+    users = UserGrade.where(:project_id => project.id).
+            order('grade DESC').
+            joins("LEFT JOIN users ON users.id = user_grades.id").
+            select("DISTINCT user_grades.user_id")
     memberlist = []
     users.each do |user|
       members.each do |member|