Hallows Eve Drops are BS

So of course everyone knows that Hallows Eve is upon us in WoW. I have run the Headless Horseman 18 times now (3 days x 6 lvl 90s) and have not got the Horseman's Reins drop yet. Now normally I would just go meh and carry on. HOWEVER when I ran it the first time the other 4 members of my group got it. Yep 4/5 people in the group got the mount an I was not one of them. Then the very next day 3/5 people again an again not me. This is bullshit Blizzard. I want my mount!!