NOTE: There is an errata coming soon, with updates to a lot of the game as well as Advancement Rules. These patch notes will be available for free.
The Advancement Rules can be found here, for now: https://pastebin.com/RtT2mNdQ
Part of me is curious about Focused Phantom or the Teacher Elder style. Do they still have access to all of the other stances when there are more than three stances? (I admit I am foolishly trying to prepare the character sheets I am building for Foundry for material that is still in development. I take full responsibility for this hubris)