Hello Raureexail74
Welcome to the SBB Community.
This is not an issue. As long as you put all your names as in your passport, no matter in which name field, plus the correct date of birth, you are fine to travel.
It would also be OK to enter all names in the surname field, while you type MR or MS in the first name field, as per international standards for flight bookings, for example.
Kind regards
Roland