Continuity mistake: When Cassandra is chasing Addie in the woods you can see that she is not wearing her white boots but trainers or flat shoes. When she catches Addie the boots are back on.
Philly Feast - S1-E3
Continuity mistake: Cooking steaks on the barbecue, one for him and one for the dog. On the barbecue, they are T-bones, but when he passes one of the steaks to the dog, it is a boneless cut. (00:37:00)
Die Zombie Die... Again - S1-E10
Revealing mistake: When Murphy gets back to the group after having walked about 10 miles with Amelia following who is now a walking Z, why doesn't she run past Murphy to the others?
Answer: When the plant zombies would attack they would wrap people with the vines and hold them, so they couldn't escape.