@Dominions Son
is NOT the situation described by the OP.
I think it might be. I just worded it poorly.
When I said "Exclusion list" I wasn't thinking of the site's category exclusion list, but more of the internal exclusion list everyone has in their head, reference stories. ie an individual doesn't like (for the sake of this discussion) scat stories, and this author only writes scat stories, so the OP hides the author/excludes them from Storiesonline story lists (Author lists, not category list), and then forgets about them.
Meanwhile, (some time later) that author writes a story not including scat, which is displayed on the home front page. The OP, forgetting they have excluded the author, reads the synopsis, finds it appealing, reads the story, enjoys it enough to favourite it, goes to read more of that authors work, only to find out that the rest of their work is objectionable and that they (the OP) have excluded/blocked the author's stories in the past from appearing.
Edit: Hence how the author ended up being on both the favourite author list and the excluded one. Also, I used singular for simplicity, but it could well be that the author wrote a sequel to the one the OP liked, or a few others similar in tone, which were enough for the OP to 'favourite' the author. On that note, I'm not sure how many readers here 'Favourite' an author after one story, or even what the median is (ie, is it after three stories where the average reader decides they like the writer. Or is it more/less?).