The orange planes you see are from the FAA ASDI Data. That feed is delayed by 5 minutes. I would guess the site is meant to ignore the FAA data where ADS-B data

The orange planes you see are from the FAA ASDI Data. That feed is delayed by 5 minutes. I would guess the site is meant to ignore the FAA data where ADS-B data is available, but in this case it looks like the call sign is incomplete in the ADS-B data.