I would recommend using this addon instead.
Creates a row of buttons showing you how many bosses you've cleared in each LFR wing and LFR buttons light up if you're currently queuing for the corresponding raid.
No more memorizing, or having to go through the dropdown menu and mouseover the small "!" icon to see which bosses are down and which you still need to kill all the time.
The original author was wT- http://www.wowace.com/profiles/wT-/ but he dropped his addon as hes not playing wow no more so im picking it up.
Opening code on github for everyone so u can help maintain this addon so it stays up to date. Add your code and il add your name in the credit.
https:github.com/raykai/Bosses_Killed_lfr
Credit:
Original authors: wT
Original addon:bosseskilled
Ghezzo: Updated TOC number and fixed Imperator.