@Benny **********
Then maybe it’s more easy for you to just do two 60 days visa exemptions as you planned, if you buy a changeable ticket you should be fine.
If you want to register your marriage in Thailand at one point for longer stays in the future, (60 days extension for visiting thai family and one year extension of stay on a Non O visa based on marriage), this is the way to go in Norway and I guess it’s more or less the same in Sweden.
Registrering ekteskap i Thailand;
1) Hente et internasjonalt utdrag av vigselsattesten fra din kommune
2)Legalisere hos UDI
3)Legalisere ved ambassaden i Bangkok
3)Oversette til thai
4)Legalisere ved Foreign Affairs i Bangkok
5)Registrering ved lokalt Amphur.