When Sam ran last time to save Juliet there comes a wide shot in which Sam is shown running wearing gray color clothes which she was wearing previously but actually, she should be in a crop top and jacket.
After Sam tells Lindsay why she loves her, the camera angle changes to over Sam's shoulder looking at Lindsay. The audio has the other girls laughing but you can clearly see Sam's jaw moving in sync to her previous line before Lindsay audibly says 'Asshole'
When Lindsay picks up Sam for the first time, the exhaust on the car indicated that the engine was cold. Even if she lived close by, after only a minute the water vapor coming out of the tail pipe is not visible. On subsequent pickups, there are no vapor clouds coming from the tailpipe, indicating the engine and exhaust system was at least moderately warm.