From the Facebook home page:
This experience is particularly frustrating because of the opacity of the system. The error messages provided by Facebook’s homepage are often generic. An "Invalid password" message could mean the password is wrong, or it could mean the account has been disabled. This lack of specificity forces the user into a cycle of trial and error, attempting to recall old passwords or alternate email addresses, often without success. report a login issue home page facebook
When submitting a report, the quality of the information provided often dictates the speed of the recovery. From the Facebook home page: This experience is