Topic sums it up, I got lucky and picked up both fist weapons last week. This week coming into Molten Core we would occasionally AOE pull everything in a gigantic radius around where we were. It was determined to be the core hound summoning from the fist weapons, as soon as I took the offhand off and could no longer summon the hound it quit occurring.
This same issue happened with Shard of the Scale/Flame set and is already fixed. The Magmadar set should be fixed tomorrow