SQ booking seems to be an ongoing issue, but an agent saw CBR-SIN available in I class, though it wasn’t confirming, and then said to check back. It appeared as unconfirmed in the reservation. I eventually gave up on it and grabbed a flight with TG, since it wasn’t ticketing. Aero plan was able to see it and capture the seat. Did UA “waitlist” it? Can anyone make sense of this?