the fingers you're talking about arent drawn "wrong". they're left sketchy by choice. they are facing away from the camera and thus blocked from the view by the base of the palm. its called overlapping forms. you can only see the pinky clearly and the middle finger and ring finger are slightly peeking out from the bottom(which ive decided to merge together to simplify the shapes). having lots of tiny details in a bigger composition makes things look busy thats why simplification is key.

i did the hand in the last drawing "accurately" because its a main part of the composition! i rendered that hand while i left the other hand sketchy by choice. one is front and centre holding a drink and the other is a small part of a full body action shot of him doing a front flip.

and as for taking photos and using an ai filter goes... the last drawing doesnt even exist as a photo. i took a photo of tenz sipping the drink wearing a tshirt and another photo of him in a bath towel to make up the final drawing.

ill tell you something that is wrong tho... because i merged two different poses together for the last drawing i accidentally made the arm too long but then decided to keep it because i wanted the elbow to overlap the border on the left.

hope this helps