So ran a bunch of campaigns though myspace ads. I did a manual audit the other day on all my campaigns low and behold i found that they over charged me around $1,000 reflected by there internal data. So contacted them and they gave me the run around for a bit. There customer service department gave me bullshit answers. But finally got the accounting department and they actually refunded me more than then what i calculated. So I would suggest you run an audit on your accounts there system is not 100% accurate yet on billing.