ok you have an issue with the facebook app.
un install ALL updates to facebook, clear cache (again), remove its sync options from the accounts and sync section.
press and hold the power button until the phone reboots on its own (look at the message on the screen telling you to continue to hold the power button).
once this occurs, go to the google play store and REINSTALL the facebook app.
once this happens go into accounts and sync and check those options again.
you are NOT rooted correct?
and does this happen on cellular AND wifi data?