Recently, players have lost the ability to have more than one active summon at a time (like dense stone elementals).
As far as I can tell, equally recently, those enemy NPCs that summon Greater Dust Mephits have been given the ability to summon an unending supply of them.
Examples include that one guy in the Maze of Madness. Someone had an Earth Elemental summoned, and it stood, staring the guy down at the gate... in reponse he summoned about 50 or so Mephits (screenshot to be added when I get home) and caused Red Alert for the rest of the quest, due to the amount of Mephits he spawned.
Another example is the named Gnoll in the Vale of Twilight. He will summon Mephits non-stop, and it will raise Dungeon Alert faster than Doggi in the Monastery.
Yet more examples... The numerous Gnolls in the Crucible that like to fall off the top of the maze and then all start summoning unending streams of Mephits.
So yeah, please fix this, and quickly. Thanks =)