Can't change weapon sets using parry skill while using single buckler.

Weirdly parry skill doesn't have "Used with weapon set I II" options and doesn't create a second parry skill when you share your buckler with the other weapon set.

This leads to parry skill to change weapons automatically when you swap weapons but won't allow me to swap weapon sets using the parry skill itself.

It only happens when sharing the buckler with the other set. Having the buckler on one set or having two different buckers for both sets works (can switch weapon sets using parry skill)