I was playing FFVII this morning and got to the Shinra Mansion in Nibelheim, opened the safe and began fighting the boss that is guarding the key to Vincent's room. And that's when things got weird....... I killed the first half of the monster but for some reason it couldnt decide which side was supposed to die so both halves of the boss are there occupying the same space and acting like two independed monsters useing both Magical and Physical attacks on my party. Needless to say, it slaughtered me.....

Magic based Boss - Red

Magic based Boss "inside" the Physical based boss
As you can see they are clearly accupying the same space to create a rather odd effect....