Why node.js express sessions work correctly in Chrome but not in IE 10

I store my sessions in MongoDB, using ('connect-mongo')(express)

When I use chrome browser: Only one session with id and coockie info created in mongoDB.

When I user IE10: Seven sessions with id and coockies are created in mongoDB.

Also connect _csrf doesn't work in IE10 when using req.session._csrf.

Help please.

node.js
session
express
csrf

Solved. The issue was cause of using Cloud9 online text pad to launch my node project and it uses 8080 port and a proxy. So IE 10 opens several sessions in this case. After I tried to start in on my local machine on 80 port, everything is ok.