Robin tells Little John and Will Scarlet that the Tarla Medical fund only managed to raise $150 on its own and that he had transferred some money from his parents account into it. A few days later when he transfers the money from Prince Corp. it shows the amount of money in the fund is still at $150 before he makes the transaction of the $5000. If he deposited money from his parents into the fund, wouldn't it have shown up? Even later on when he takes more money from Prince, Warner and Gibson, the so-called "McCallister" money is never accounted for. I think this was a total slip up, for those who really pay attention.