As I have said, the WoTc post is correct. However, its referring to special multi attacks, such as those granted by the multiattack feat.
A normal melee situation though will usually be a single attack roll vs the defences of many critters (such as in the case of whirlwind attack or fireball)
A normal melee situation though will usually be a single attack roll vs the defences of many critters (such as in the case of whirlwind attack or fireball)