Bill I think you may be right I have said that the same should be abolished. It is a cop out and can be used easier to manipulate results. I think there should just be a straight choice as to which one you think is better. Degrees should not come into the reckoning.
Here is a typical example to illustrate why. Take two bad songs but one is miles better than the other. Why should you be allowed to place then the same. Brian A Whitney freely admits that he votes this way. Is this fair on the song that is better AND how much is this song's RIGHTFUL place devalued by?
I have done a lot of judgements and can say with confidence that songs voted by the majority according to the stats as better are often placed well below. If 70% or more vote the same as you I would hope that the song actually places higher.

http://www.soundclick.com/bands/songInfo.cfm?bandID=687727&songID=5238055