These trio sonatas are the work of Juan Oliver y Astorga 1733/4-1830), not the work of Emanuele d'Astorga (1680-1757). They are in a classical idiom consistent with Juan Oliver y Astorga's era and work, not the conservative baroque idiom of Emanuele d'Astorga. I found confirmation of my hunch about this in the works listed for these two composers in Grove: a set of flute trios is attributed to Juan Oliver y Astorga, while Emanuele has no purely instrumental works listed. The sixth sonata in this set is the work of a different composer named Nohr (a detail also noted in Grove). If you look at these part books, they name the composer only as Sigr. Astorga.
Please correct this listing.
Thank you, Gwyn Roberts