Keep getting locked - have authenticator

It happened once yesterday and twice today. When I try and log-in (which is very often because I get disconnected a lot and also because I go away from the computer a lot then come back) I get the message that my account has been locked because "A change in my log-in patterns has been detected".

I have an authenticator, I have used AVG and Lavasoft Ad-Aware to confirm that my computer is clean and my location is correctly registered on my battle.net account. I was hacked a couple of months ago before I got my authenticator, and I think my account was put under heavy watch because it was getting locked frequently. But now I'm getting a different message and it's happened consecutively today so it's a little bit frustrating.
Just want to know if anybody else is experiencing this because of the patch? Or if this is an isolated issue because of the history of my account since I moved to China.