Body double and different shot

The scene was shot by two sided, one is from jennifer and other from harshad. But, after watching so many times, I realise that, the scene which was shot from jenni , there harshad's hair style and expression was different, might be with some anger.

But, the scene was shot from harshad side, was with different hairstyle and expression...also the actress who was faced to harshad, was not jennifer.

I might be wrong...just express what I realise.

Why body double iski Kya zaroorat pad gayi😲

Are yeh sab common hai kabhi kabhi late hona or voh dusre shots mein ya kaam mein busy hote hai tho they do hav BD's😛

See I feel..they do there scene together on came..than the important n impactful emotional scene n all is shot again with bd as already the needed shot is taken n the actor can relax till than important closeup scene is being shot...everyone can't be present na to do the scene if it's closeup scene ...n nothing about kaam kyu nhi kar rahe eksath it's part of the acting n shooting work..