BSG Last Supper

I was looking at this picture, and realized that there is no "Christ" in the photo. They try to make it seem as if Caprica Six is the central figure, but notice how she's just off-center. Also, there are only twelve people shown. The "Last Supper" image shows twelve apostles in four groups of three, with Jesus as the 13th and central figure.

The "Christ" figure must be absent. Maybe the character hasn't the character hasn't appeared on the show yet? It's said that the missing character is the last, unrevealed Cylon. Not to sound religious, but could it not also mean that there's no "savior" in BSG?

Also, the missing character might be someone Lee Adama betrays (since he's in the "Judas" seat).