Changing loadout in navigation screen won't change primary focus school.

[Naftal]

Like the title says, if you change your loadout in navigation screen, you will use whatever primary focus school you had with the previous loadout even if the new loadout had something else as primary.

You need to go to arsenal for the primary focus school to actually change.

[Hello]

I'm in the same position as this. Initially I thought I was doing something wrong. So I have a mediocre Eidolon setup I use for the Teralyst but I have Madurai on there. Zenurik on everything else. Changing from the arsenal works all the time, changing from the loadout option on the navigation screen just leaves the focus school the previous loadout selected from the arsenal.