I saw your question: “How can I invite additional people to a Scheduled Rondee conference call?”
Here is what you need to do. I am assuming that you are the organizer….log back into your account and click on the link that says “My Rondees”. Then go ahead and select the particular one that you are focusing on. After you have clicked that link, you’ll see a box that appears in the middle of the right-hand page which is marked “Invite more people”. Go ahead and type in the e-mail addresses of the people you want to additionally invite and then click done which is the box in the lower right-hand corner. When you’ve done that, those additional people will be sent e-mail invitations to your conference call.