Worried but interesting! But how it could happen Are you sure you haven't placed those bet by mistake? Or anyone came to your home and placed the bets while you were outside. Seems like the anonymous person placed 7 bet with 0.01880941 btc, and then placed two max bet. It could happen by you unintentionally. Cause freebitco sends authorization mail while a user tries to login from different connection or ISP.

Moreover if someone else(hacker) did it by login to your account then he wouldn't stop betting after reaching 0.45142584 btc. Cause he (hacker) won't be able to withdraw the balance to his address without having access to your email. Probably he will continue to bet until everything become zero. Have you ever received new login authorize message which wasn't performed by you?