So first the scare. As I had never ticketed an infant before, I was unaware you couldn't do this online until I was putting in the birthdays on my connecting itinerary I found with the Unelevated search tool. I started to think I was out of luck after reading the earlier stories.
The good news, I used the chat feature in the award booking window and the agent was able to ticket it for me as a connecting itinerary. So maybe the agents have a fixed system now. Or at least the chat agents have a better one than phone agents. Or I just got lucky. But it looks like there is a feature on the agents side that works for connecting itineraries so hopefully this means the program still has some use going forward and the customer facing side will get full functionality soon.