Vaderisnothayden said:

Well, they showed three people screen testing total. They had to have tested more people than that, or should have. Jake was the best of those three, but that's not saying much. They could easily have found a better actor for the role.

Weren't those three the finalists? I seem to remember the casting director talking about all the kids they interviewed and tested before narrowing it down to those three. I'm sure they could have found someone better, but the dialogue has to be blamed just as much. What can you do with a line like "oops?" (as TheBoost said)