PF3 gains it's AI data from FSUIPC and if the format or name is not recognised by PF3 you will get the first part of the name given phonetically rather than hearing the correct callsign. PF3 does NOT only see and respond to air traffic but ground traffic also. Finally NO, PF3 does not read the AI flight plans and knows nothing about where AI traffic is coming from or going to.
PSXseeconTraffic must be injecting titles that PF3 can’t recognise. I’ll keep experimenting.