Exterior shots of the space station show that the toroidal portion of the structure is rotating. Every view of astronaut Woods aboard the station, however, shows her to be weightless. Unless she spent all her time at the center of rotation of the station, she would experience some weight, depending on how close she comes to the outer rim of the torus.
When Molly has her encounter with her deceased first husband she sheds a tear that rolls down her cheek. Because she was in a zero gravity portion of the station, the tear should have floated off into the air.
Scene 1. Guy on left of screen behind BBQ seems to talk to no one just before kids are heard shouting.