Did you get those figures from the order book? If so, you misunderstand: those figures are the total of all the orders at 430 satoshis. That's how all exchanges present their order books. Every buy order at the same price, no matter how many of them there are, is aggregated into one line of the stack. Same with the sell orders.

You'll see that if you hit the ask at Cryptsy with a substantial buy. Your single order will generate several trades at the same price.