SAS options do not correspond to the pilot
After an update all my crew members and probes in career mode have all SAS options available. Both in existing and new games.
No mods installed
I've encountered this bug as well. Playing a science game with Kerbal experience setting on and all DLC installed via Steam on Windows. All Kerbals gain XP normally, but have all SAS modes unlocked at level 0. Probe Cores also have all SAS modes with that setting off.