I dont know what publisize is? and it hasnt gone back to normal :(
What you have been describing about your posts appear on Facebook is Publicize, so I'm sure that you're using it. Please try reconnecting: http://en.support.wordpress.com/publicize/#reconnecting-facebook
someone else did and was posting about jobs etc in the feed to the side of my blog?
Oh, they were posting info about Jobs and such to your Wall on Facebook, and you can report them to Facebook from there.
They would actually need to post to your blog to hijack your Publicize feed, which clearly hasn't happened.