Ok so I just transferred bitcoins from one wallet to coinb.in wallet and after waiting several hours, I realize that the coins were withdrawn to another address. Now, I don't share my info with anyone, I have a clean PC in terms of viruses, and I have a password consisting of capital letters and numbers.

Please review the blockchain link:
https://blockchain.info/address/1Na34EcbRhVFdxyo8WXRuZQChdwPYHhPwX

Please someone tell me what is going on, or point me in the right direction. This is A LOT of money. Was I scammed by coinbin? gone? Am i completely missing something?? I'm freaking out