There are malicious apps that changes the address from clipboard to another one, you should check your PC, this may be the case and may lead to another loss, be careful.
Also, always double check the address when you send coins, or triple check, losing money so irresponsibly is not excusable for many times in a row.
Indeed, it's a very stupid loss, I hadn't lost coins since MTGox closure..
After your reply, I checked my MacOs processes and chrome extensions, nothing looks malicious.
I also looked at all my exchanges and none have this address.
I checked etherscan, the money is still there.
Can someone tell me which adresses have same format as ethereum? I will check my other altcoin addresses..
Thanks!