I was reading the rules for character creation and advancement yesterday and I noticed something...
The rules for advancements seem pretty flexible and seem to allow for interesting combinations (like a court poet who is also a suprisingly good sword fighter). Still, it seems a bit weird that there are no restriction on how you spend your PC's XP to advance in the school rank? There's the curriculum, but you can also buy out-of-curriculum skills etc. They do count toward rank progression - to a lesser extend than curriculum skills, but they do. And I can't find any information that you need to advance in at least some of the curriculum skills to progress to the next school rank...
... which, in theory, seems to mean that you can have a PC that belongs to a Bushi school, but then spends a lot of XP on completely non-Bushi advances - and still progresses through the school ranks. Even though the PC doesn't actually learn anything his school teaches...
Is this deliberate? Is this a possible hole in the rules that's allowed to stay, because actually doing this makes no narrative sense for a PC? Or am I just reading the rules wrong?