When Nick was in the shower, Alice walked in to the bathroom to talk to him. From the shower, you can see shadow coming in and stay right outside of the curtain. The next scene, you see Alice just walked in to the bathroom.
It looks like Emily dyes her hair blond before she boards the bus, but once she makes it to the forest, she's a brunette again. However, before she boards the bus, she is seen entering a store with wigs and in the forest, she removes the blond wig before she starts digging.
When Emily is in the truckstop, it is clearly an European truckstop. None of those vehicles would be seen in USA.