I was uninvited from a birthday party several years ago, and it's an awful feeling. I still hold a grudge against this person. I was invited by one person to a birthday party, only to be told by this other person that there were too many people going and I couldn't go-so I didn't. I later found out from the goh that there was plenty of room and the person that uninvited me really wasn't hosting anyway.
It's terrible that they only reinvited a few of the people, but even worse that they spread it on Facebook.