It isn't actually supposed to be there but it is in the Mibba article you're talking about.
As much as it irked me, it was written by a Mibba member and you should have just commented the article and said so instead of writing an entire journal about it. Doesn't this count as insulting another member? :\
It may have been hyphenated. I know a lot of people with both their mother's and father's last name. Celebrities alter their names to make them more appealing. No need to freak out over it.