Doedre's Dark Design improper level calculation with corruption

The level of Doedre's Dark Design (from the Doedre's Undoing lineage support) is supposed to be the same as the curse it supports but it currently doesn't take into account the "+1 level from corruption".

This lead to situations where the curse is lvl 21 but "Doedre's Dark Design" is level 20.

I suppose this is not intended as other level modifiers affect the "Doedre's Dark Design" level but the corruption is the only one not having effect.