The New York City Ballet Orchestra (always) has two harps, and possibly American Ballet Theater. Perhaps they are alone in that. Miss Lawrence used to say one should refuse to combine, only play the first part. A second harpist isn’t paid more than another violinist, are they? But I don’t suppose that works in the real world. If any combined part were to be posted, it should be one by a harpist, like Joan Ceo, who has I think a complete orchestration done.
As for the St. Paul Chamber Orchestra, they have never had a full-time harpist, shame on them. The second harpist with the Minnesota Orchestra has never been full time, that I know of. So I don’t think we stand to lose very much there.