Looks like there are some code share issues that need tending to on WestJet / Delta flights out of KBOS. There are several examples of Delta flights with type listed as DH8D out of KBOS now, DAL7645-1512800759-airline-0160 being one of them. In these cases, the Delta flights shouldn’t be getting returned in the FXML3 AirportBoard calls or be appearing on your public facing website.
Thank you for reporting the issue. I have sent a ticket to our developers to have them look into the issue.