Hello Couzoikeas70
If you have made a booking with ÖBB, I advise you to contact ÖBB concerning your seat reservations. In order to give you the correct answer, an agent has to look into your booking; this can only be done by an agent of ÖBB railways.
There is no direct train Luzern to Salzburg. The journey consists of two parts:
- IR train, Luzern - Zürich HB (no seat reservations possible - free seating)
- RJX train, Zürich HB to Salzburg (seat reservation possible)
For the Zürich HB to Salzburg part, it looks like you have got one seat reservation only, instead of two. I conclude my answer from what you describe. Please clarify with ÖBB railways (do not post any ticket related documents on this platform, for privacy reasons).
We gladly remain at your disposal for any travel related questions on Swiss trains.
Kind regards,
Roland