For some reason, it lists all mobs as being in Arathi Highlands, while they should obviously be listed as being in Nagrand. As far as I can tell, this bug has been in the addon since the very beginning, presumably due to the original author confusing the Boulderfist Ogres in Arathi Highlands with the Nagrand Boulderfist clan mobs. Note that it also lists Kil'sorrow mobs and Murkbloods as being in Arathi Highlands, which is also wrong

Thank you for telling us, I have fixed it and pushed an update that should be available soon.