VisuStella's Battle Core has <Unblockable> as a notetag - this one bypasses the Guard state. Your plugin has an identical notetag. Haven't had the luxury to test this out, but... just sayin'.
The two are probably read correctly, but will stack the effects, so an attack with that tag would be unblockable and would bypass guard, and you have no way to tell it to do one or the other, only both.
