Headhunting: Loom'ithar was given after last boss in wing

I haven’t been keeping up on the forums regarding gameplay, but was this quest meant to be given when I zoned into LFR today, or was I seriously handed a quest for a boss I had already killed and need to wait another week for?

I’m so confused.

You can get back in and kill the boss a 2nd time on lfr just no loot.

Yes, you can still compete this quest by joining LFR or even Normal and killing the boss you will still get the credit but no loot if you have already looted them.