I'm aware, but these were only local councils. Another one, the (even earlier) Council of Laodicea (c. 363), didn't include the disputed books. As I said, plenty of distinguished churchmen held the Apocrypha to be lower-grade and not inspired. Another council, of Trullo, endorsed both the Laodicean and Carthaginian canons despite the fact that they disagreed with each other!
As to what the LXX including the Apocryphal books, they disagree among themselves as to what to include, and they include some things that nobody thinks is canonical. If you say, for example, that there are references to the Apocrypha that are close enough to be quotations, this proves too much. Jude quoted 1 Enoch, which only the Ethiopian Orthodox Church considers canonical; and Paul quoted figures like Aratus, Menander, and Epimenides, without considering them Scripture. Of all these, nobody ever writes, "It is written," or other indicators of being considered Scripture.