duplicate request from the client express nodejs

i have a problem in my app that i cant resolve

first of all my app:

nodejs 0.8.14 express 3.1 passport-local 0.1

the problem is when i login in passport session the client request the page two times...

i discover that because i put a request var in the url

this in my router

exports.index=function(req,res)
{
    console.log('success: '+req.url);
    var sesion_usuario=validate(req.params.code_user);//if not valid return null
    if(sesion_usuario){
        res.render('logged',{title:'Hello'+sesion_usuario})

this in my browser

http://localhost:8000/YOGE7419

this in my app

app.get('/:code_user',routes.index);

and this is what im receiving in my prompt

success: /YOGE7419
success: /YOGE7419
DEBUG: validate error: maxlength not match

and the url transform in this

http://localhost:8000/YOGE7419#sthash.zp1bOY2d.dpbs

why is that??? whats happening between first and second request?? tnx

APP CONFIGURATION

app.configure(function()
{
    app.use(express.favicon(__dirname + '/public/images/favicon.png')); 
    app.set('port',  8000 || process.env.PORT);
    app.set('views', __dirname + '/views');
    app.set('view engine', 'jade');
    app.set('view options',{layout:false});
    //app.use(express.logger('dev'));
    app.use(express.bodyParser({uploadDir:'./public/uploads/'}));
    app.use(express.cookieParser('nomatherwhatdoyoudobatman'));
    app.use(express.session());
    app.use(passport.initialize());
    app.use(passport.session());
    //app.use(express.methodOverride());
    app.use(app.router);
app.use(express.static(path.join(__dirname, 'public')));
    app.use(function(req, res, next){
        res.render('404.jade',
            {
                title: "404 - Page Not Found",
                showFullNav: false,
                status: 404,
                url: req.url
            });
    });
});