Edit: I got it to pop when I logged into an alt warlock I had on my account. Thanks so much for the help!
I have wanted the Green Fire Hawk since I played the beta for WoD. If you look at my achievement tab under collections-mounts I was sitting at 248 mounts I needed 2. I got a deal yesterday on the Depleted Kyparium Rocket bought it and learned the mount. I then ran Utgarde Pinnacle and finally the Blue Proto Drake dropped for me. I learned it and waited for my achievement to ding! Nothing-sigh. I logged off and logged back on-nothing.. I logged out for the night and back in and still nothing. By my counts that should have been mounts 249 and 250. How come I didn't get the achievement? Is there another place I need to look for an actual real mount count?
I am super disappointed. I thought I was so close and I thought the collections tab was giving me the correct count. Now I have no idea how many mounts I really have and how many more I really need.
Has anyone had this happen or can you explain why I didn't get the achievement?
Thank you!