Bug or feature? Hidden move on Tokyu-Style

[Ragna]

So I just noticed that my tokyu style has the bugyo style hidden move All or Nothing instead of the 6-way Slash whenever I equip the Haruyuki/Masatoshi (which is the weapon needed to learn/use said move in bugyo). That being said bugyo style was the last of the hidden move styles I have mastered and my tokyu style was directly behind it in the style library.
I tried equipping weapons for other hidden moves and put those styles next to tokyu to test it, but this seems to only work with bugyo and haruyuki/masatoshi.

Has sombebody else experienced something like that? Gonna try and check if "reacquiring" the style in a new cycle will still result in me having this move.

Edit: After some extensive checking, I still have this move every time, no matter what I do (having one or both in my iventory/stored at the dojo, seperated by other styles or not and even having one of them equipped) while starting a new cycle.