Yeah, I didn’t pay attention to those airing dates, but I see on IMDB they start season 4 on season 3’s Roswell That Ends Well and it’s a jumble compared to the production order. So 5 seasons out of the original 4, then the movies, then 2 seasons per season.
11 seasons I think refers to the original airings. IMDB has the 11 season episode list: https://www.imdb.com/title/tt0149460/episodes/, meanwhile Wikipedia shows it as 8, but splits the seasons down a bit, however for some reason there’s only 10 there: https://en.wikipedia.org/wiki/List_of_Futurama_episodes#Series_overview
Yeah, I didn’t pay attention to those airing dates, but I see on IMDB they start season 4 on season 3’s Roswell That Ends Well and it’s a jumble compared to the production order. So 5 seasons out of the original 4, then the movies, then 2 seasons per season.