Why are you not paying attention to all the details and not just looking for the girl in white? Nobody said they were not at both recordings, simply their positions changed. The position of the girl in white that you are pointing out would be obscured by Hunter when Biden puts his hand on the bible. Instead when Biden puts his hand on the bible she is 3 feet to the right of Hunter. This is not a parallax issue, she changed positions. The swearing in was recorded multiple times, likely because Biden fucked up the oath.