how did somone send me a message on facebook when i blocked them?

[radioactive enegy]

a couple of yeas back i blocked some douche on facebook and he still sent me a message asking if i was gay despite having blocked him in the first place.
please don't say his not blocked because i know for sure he is

[Luke]

Maybe he's not blocked? Double check to see if he is.

[Ripon]

Maybe he is not blocked, you check this in the blocking option.

[Prόsεη™]

If someone is blocked he can't contact you. Maybe that's another account (With same name) he is sending message from.