Claire slaps Topher with her right hand. They are fact-to-face, which means she slaps his left cheek. But in the next shot, he is rubbing his right cheek.
When Echo is at the airplane hanger after her concussion, she slips into different imprints, including the ditzy girlfriend from the finale of last season. She asks to see Alpha's "character", but she calls him by the wrong name. His name was "Bobby", she's asks for "Donny".