At the start of the magic show, Wanda is wearing earrings. A few minutes in, she is no longer wearing them, but by the end of the magic show, she is wearing them again. She is not shown putting them on or taking them off.
In this episode set in the 1960s, Vision is given a piece of Big Red chewing gum. Big Red was not introduced until 1975. (It's possible this is a clue to the artificial nature of reality in Westview.)
While Vision is hanging from the rope in the magic act, Wanda always cranks the winch in the same direction, no matter whether Vision is being raised or lowered. She should be cranking one way to go up and the other way to go down.