When Maggie steps out of the house to check on her dog, she is wearing the earrings that had already been stolen by Ma several days before (although they're missing again in the next shot.)
When Ma and Ben are sitting in the bar, the whiskey and diet Coke appear out of nowhere on their table.
When Ma is leaving her pedicure, she lifts the arm of the chair to get out of it two times.
When Erica walks out of the store after confronting Ma, there is a sign on the door that says PUSH HERE. Despite the sign Erica clearly pulls on the door to open it on her way out.
The blood bag label that reads "Louie" disappears and reappears between shots.
Despite not representing a rich family, Erica owns the flagship model (Inscription) of the biggest Volvo model (XC90) with a hybrid engine (over $80k new price or $1k/month lease price).
When Ma gives Genie the injection, she is not wearing any gloves.