SLComposeViewController always returns true if the facebook application is installed on the device

Question

I use SLComposeViewController to share facebook, everything works fine, except that I left the facebook application from the device and then called SLComposeViewController isAvailableForServiceType: Facebook, it returns true and the facebook pop-up message appears, and on top of this facebook warning ' Not Logged In 'is also displayed. if I click ok on this alert, then the Done block is executed. Appreciate the help.