Probably occurred in some kind of error, and your character was downloaded from the last conservation, therefore, regular Save.
Another possible reason - someone knew your password (for example, if the password you use your user name or a simple combination of 123, abc, ABC, etc.), included on your behalf of all confusion and plant (Amateur, and a number).
Knowing that one character can simultaneously manage a number of people, even if you play, the one who knows your password can throw things at the time, or to attack your character with the protected area. If you find that your character owns anything else, change your password immediately. Exception - administrator work in correcting the errors or the like.

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