One thing that wasn't covered in the previous response (this taken directly from the rules posted on the site):
"If you compete in more than one Invitational either as an individual, or as a member of a Team, and you and/or your Team is invited to compete in the World Wide Finals in more than one Invitational, you may only compete in one Invitational at the Worldwide Finals. In other words, you will be required to choose one Invitational in which to compete at the World Wide Finals."