When the Ewings are having breakfast outside at the beginning of the episode Lucy is wearing the white pants, white shirt and suspenders outfit. Next time she's in a scene she is at school where she confronts the professor she was seeing. She has on a turquoise dress. Next scene with Lucy she's back in the pants outfit.
JR arrives home in a wheelchair, and is next seen in his bedroom, with no suggestion of how he might have made it up the winding staircase. It would also be far more normal to make a downstairs bedroom for someone in his condition.