People are annoying

My coworker keeps making me go over my work again and then does it herself afterwards. The only thing is that it makes absolutely no difference. It was fine the first time I did it and going over it again and again makes absolutely no impact and it’s exactly the same but we just wasted a bunch of time. Now we’re rushing to get everything done and Im already tired. God why do people have to be so annoying? I really miss working alone.