Are you the only person using that definition?

Because traditionally English speaking Marxists use them the other way around, as far as I remember, (work is useful, produces use value, labor is economic, produces economic value) if they make that distinction at all.

See for example:

https://www.triple-c.at/index.php/tripleC/article/download/546/598#:~:text=In%20the%20Marxist%20tradition%2C%20the,(Fuchs%20and%20Sevignani%202013).

(Posted without endorsement)

EDIT

Apparently the English edition includes a footnote by Friedrich Engels:

As has been stated in a previous note, the English language has two different expressions for these two different aspects of labour: in the Simple Labour-process, the process of producing Use-Values, it is *Work; *in the process of creation of Value, it is *Labour, *taking the term in its strictly economic sense. — F. E.

Which reads very much like you are using them wrong.