Total count of followers gets increased when back action is taken on browser

[GSoster]

When a user press the back button of a browser (button to go to the preview's web page) immediately after add another user as following the followers counts for that user will increase. It should not.
Probably it is due to the way friendships are being handled in the database. Right now a new relationship is created to every "follow" action. It should check if it already exits and only after that try to add a new one.