So I'm in the FM right

The party invite dc hack doesn't auto invite you. You have to click OK in order to get in the party.

I think its the other way around, they spam with you with the message box that says "You have invited "_____" to your party."

I don't see the point in having that feature in the first place... if you invite someone to your party, why do we need a reminder that we did so? We just invited them, unless you have really bad short term memory loss -_-