Hello BerSwitz25
You probably bought the tickets by a reseller and not on the SBB site because the word “Bahnhof” never appears in Switzerland. The official names of the stations are:
Zürich Flughafen (airport)
Zürich HB (main station in the city)
Luzern
You need a ticket from “Zürich Flughafen” if you start your trip at the airport. If you have a ticket from Zürich HB, you can:
— Cancel it and buy a new one from Zürich Flughafen (if possible).
— Or buy a ticket from Zürich Flughafen to Zürich HB after your arrival at the airport. Such tickets have a limited period of validity, it is not recommended to buy them in advance because your flight could be late.
Kind regards
Danhiel