Re: [ANN] Bitcoinica Consultancy abandons customers. Bitcoinica to enter Liquidation

So why the funds where split in four parts if there is only one account?

The funds were split in four different wallets, including one which have been used for previous transactions.

http://blockchain.info/address/1BpuTiQKCKrikmmsbr91D9MVVzdJZyYCf1

When you deposit funds on MtGox, those funds are then used for other accounts, it's the way most (if not all) online wallets are working.