@Sabardeyn
In fact, the problem persists.
I made several changes to settings and I forgot that the books were configured for the Spanish language. In this way they were arranged alphabetically in kindle/kobo. But the dictionary does not work (Portuguese). So I changed the book's language to Portuguese again, the dictionary worked but the kindle/kobo ignored the articles in 'title's sort' and everything went back to how it was before.
Only the authors are listed alphabetically, sorted in kindle/kobo as FN LN, although they appear in Calibre as LN, FN