Hello, and I'm pleased to introduce the mechanic of this Gemini for you and have your suggestion on rewording noted.
When you deal DMG with either of your weapons, the game will decide which element deals higher DMG and apply the corresponding bonus to the current(holding weapon) element.
However, you won't receive any bonus from ascensions and scrolls for the other element. It may just enjoy the bonus from countering element(i.e. Corrosion DMG is more effective against Shield).
While your suggestion is true, it may be too long to fit into the UI of this inscription. We are currently looking into it and find a more appropriate way to mend this misleading issue.