Harry Potter books vs movies

so in the movies we see ,both Padma and Parvati patio are from Gryfinddor but actually,they Parvati was from gryffindor and Padma was from ravenclaw . In the movie deathly hallows part 2,we see that everyone came back to fight against You-know-who .and so they did, but in the books they have specifically mentioned that Oliver woods came back to Hogwarts with his broomstick .In the movies they didn’t focused on each and everyone ig. while Cedric diggory was also the brightest wizard of his age ..