When Elena is texting Caroline/Tyler, it shows Elena's text that says "Headed to lakehouse w Stefan. U okay?" But when Tyler reads the texts is shows it says, "Headed to the lake house with Stefan. U okay?"
When Stefan pulls the light switch cord in the secret store cupboard, the shadow of the cord is shown swinging loose on the opposite wall. But in the next shot, Stefan is still holding the light cord, so it would not have been swinging, and his hand should have been part of the shadow.