This is not accurate. It may have something to do with you being the only one on your account. I have my family of three, plus DS's friend, linked to my
MDE. I was able to select the number of participants I wanted (even more than I had linked, actually) and make a single reservation for as many participants as I wanted. In your case, you can make ONE reservation for TWO participants and have two "watchers". Just have an idea of when you'd like to work it into your day, you're given a choice of 3 times-at least I was- (depending upon availability). Also, I don't *think* you need to wait for your ADR date to secure a timeslot. If you go to Savi's page, you can make your reservation there. They have slots open through August 9th currently. If your ADR day is coming up soon, you shouldn't have an issue getting the day and time you want if you want to book it now.