Hi Ian. I'm clearly missing your point here as we seem to be going around in circles. Your registration G-EZTJ doesn't seem to be listed at all so use one of the other G-EZT* registrations of which there are plenty. For EZUH use EZU* registrations. EZWC is indeed for the FSLabs so use EZWB instead. EZUC is in the list. The fleet list is not complete so you won't always be able to match up with your liveries.
If it's the airframe in the schedules which is confusing you where some show it operating with a FSLabs aircraft then ignore this. Similarly if you only use the Fenix A320 then ignore any suggestion that certain flights are operated by A319's. Blue Skies accepts an A320 for all A319 flights. Credit for much of the database work such as schedules and airframes goes to long standing member Andy Smith who obviously tried to make things as real as possible. Andy has stepped back now and so the schedules and airframes are what they are. To make up for the fact that new routes are being introduced which don't feature in the schedules you can fly these new routes by using the Charter feature here https://www.jetva.co.uk/index.php/Forum/topic/5262/1 Rob