There are a bunch of Xiamen / WestJet codeshares showing up erroneously in my FXML3 AirportBoards results as their own flights. Flight numbers appear to be in the CXA6000 series.
Thanks for bringing this to our attention. It looks like a data source didn’t include codeshare context for a day or two for several Xiamen flights. Thankfully this appears to be fixed at the source and new instances should not be expected.