Ya, I think you may be right. However, I am almost positive that the log is actually in the line of fire because I think the people in the third log get drenched from it. But I may be wrong on that. I just don't remember every getting overly wet on that ride and I always figured it was because we weren't "lucky" or "unlucky" (depending on how you look at it) enough to have been in that third log. Yet, other people speak of getting quite wet.
Either that, or maybe we're both right. I know you're right about the canon, because I remember that now. But I wonder if it could also be that they have it set up such that, somehow, the third log makes more of a splash, in addition to the canon. I'm sure someone else can clarify this for sure.