Question about the final bet
"Harmon" tells Linneman to "Place it on Lucky Dan". Lonihan, not being familiar with horse race lingo, assumes he meant Lucky Dan to win first place.
What I don't get is, was the con dependent upon Lonnegan making this mistake and thus betting on the wrong horse? We know the "FBI" was going to come in and disrupt the race anyway, but they were only put into the scenario later on in the operation when Gondorff found out Hooker was in trouble with Snyder. So what was the plan if Lonnegan correctly placed the bet on Lucky Dan?
Also, why would Harmon tell Lonnegan he made a mistake (when he says "I said PLACE! That horse is gonna run second!")? Was it just to rub it in even more?