Incorrect name on messages?!
I have just upgraded to mountain lion; love it so far, but I have a problem with messages. When I first loaded it up I was asked to log in using iCloud/apple ID, which I did. To begin with messages were sending fine, but the response would only come through to my phone. I fixed that now, but I've just realised on my screen it says I'm sending outgoing messages as 'Marilyn Christison'........which is my mothers name. Now she has never once used my computer, or my iPhone, nor iCloud, she has no ios devices! So why is it her name coming up!? This is so weird.
MacBook Pro, OS X Mountain Lion (10.8.1)