I removed Brian Van Holt from the regular cast for Season 6 of Cougar Town, and it seems to have "taken" here: https://www.themoviedb.org/tv/18202-cougar-town/edit?active_nav_item=regular_cast&language=en-US and here https://www.themoviedb.org/tv/18202-cougar-town/cast?language=en-US , but not here https://www.themoviedb.org/tv/18202-cougar-town/season/6?language=en-US (need to expand the cast) or https://www.themoviedb.org/tv/18202-cougar-town/episodes?credit_id=52585577760ee3466109b807&person_id=4bc89331017a3c122d00f90e&language=en-US (scroll down to Season 6).

Did it last night, so I guess it may take a while to filter through the database?