the 4-4 split will happen if Julia defects to the guys, then it will be
Jason, Scot, Tai and Julia
v
Aubrey, Cydney, Joe and Michelle
And the guys can play their super idol and gain the majority - or, because Joe was left out of the loop on the Debbie vote, he might (possibly but not likely) defect to the guys too (which won't happen) in which case they have a 5-3 majority and they don't need to play the super idol.
Jason, Scot, Tai and Julia
v
Aubrey, Cydney, Joe and Michelle
And the guys can play their super idol and gain the majority - or, because Joe was left out of the loop on the Debbie vote, he might (possibly but not likely) defect to the guys too (which won't happen) in which case they have a 5-3 majority and they don't need to play the super idol.
Teenaged X-Files obsession + Bermuda Triangle episode + Self-led school research project = Atheist.