This "unpredented mistake" is more thought provoking than even who wins, as puddin said.
And given how this is going to affect whether we have a final 2 or 3, I wonder if Phil won't have to do some special explaining this week to us? And I wonder if we will see a last confessional by the affected team as well?
I remember how he sat Momily and the Guidos down in Season 1 and explained to them on camera, (and hence to us), why Momily was eliminated, even though I think the Guidos arrived last, so perhaps we'll see something similar this week. Either explaining on camera to the team what happens next, which of course fills us in, or explaining directly to us...
Since this is such an unusual and pivotal week, I think TPTB won't leave us wondering for the finale, so hopefully all will be explained.