When Gaitonde shoots himself and is slumped in the chair, the first scene shows the gun between his legs. In the following scene when Sartraj approaches him, the gun has moved to the top of Gaitonde's right thigh.
The Janehu/Janivaram (sacred thread) worn across by young Gaitonde and his father (both of Brahmin caste) is wrongly worn. It is normally worn on left shoulder running across the upper body till right hip and going around the back making it a loop. In this episode (S01Ep01) it is shown wrongly going from right shoulder to left hip.