Sorry to read about your losses. 2fa should have saved you here but reading the logs from the bottom up it was enabled after it was redrawn.
Yes Mate the hacker activated it using his authenticator which kept me from logging in into my account after he hacked it and because of it i have waited 3-4 days for bittrex to remove the 2fa and saw all my funds are gone
that was a shock bro
You made more essential mistakes. Do you keep backup authenticator keys on the same email address?
Are you sure found the way how they are hacked your account?
If you have accounts on other exchanges, wallets etc ... you need to check it also and change your passwords ASAP.