possible that someone's been playing on my account...

I logged in today after work, to see that all my bags were changed.
I have a very particular weapon set i use, and its was not set up like that at all. All my primaries but bag 4 ak fury was changed, The First two bags had no pistol equipped and primary weapons i do not, nor have ever used. i cant remember if my bag 3 was messed or not up right now.
I've changed my password in hopes it does not happen again, but i'm not very happy about this. I hope this isn't as it appears, and hopefully just a database glitch, Either way, not quite the security or stability hoped for............

Any knowledge into why this may have happened would be nice.