QUOTE(Eyes of God @ May 13 2007, 09:43 PM)
maybe it is because they felt that active elements should not directly face another active one. so the arrangement is passive active
On the other hand, casting a circle is supposed to work as sort of a generator of magical energy. In a generator it varies from positive to negative points magnet-style, which would make sense that a circle should go passive-active-passive-active. Therefore, based on electromagnetic principals and such, would raise more energy than having the active elements together and the passive elements together.