Ever feel like someone is getting on your accout?

CatStalker: I've had times where I haven't played for 2-3 days, and my wotlabs sig still shows stuff in the 24 hour category. Since it would be kinda important that nobody else is on my account, I checked both my games played history and IP log, and my service record and connection log showed the proper time since last game played.
It's always good practice to change your password every once in a while, but I wouldn't worry too much, probably just a hiccup in the third party website.