After Kim leaves the office Christmas party, she stumbles out into the street and sees Ricky standing beside his parked car to her right. The license plate on the car is backwards, which normally would indicate that the shot was reversed in order for it to match up with the direction Kim was looking. However, all other text in that shot is NOT backwards! Correctly displayed is the word "restaurant" on the green sign in the background, the word "Dresden" on the green awning next to that sign, the name "Mustang" and the Ford name and emblem on the back of the car. The only thing flipped is the license plate, which means that it was done physically on the actual car and is not an editing trick.
The numbers on Lonnie's house are backwards, which normally would indicate flipped footage, but that's clearly not the case as it appears this way in multiple shots of the house. For whatever reason, the production crew put the numbers on the house backwards on purpose.
Towards the end, the Kim character has disfigured hands and when the camera cuts to the angle behind her looking forward with her, the actress' (Neith Hunter) hands are shown holding the effects/prop very clearly.