I have a question....I was switched to a obgyn that's an hour away when I went in to preterm labor,…

I have a question....I was switched to a obgyn that's an hour away when I went in to preterm labor, which I don't mind because I prefer them over where I was going previously. but anyway, when I was at the first doctor I was given the flu shot during my 26th week. Well, the place I'm at now keeps trying to give it to me every visit and I've told them multiple times that I've already had it and that I don't need it again. Do they not put that on record that it's already been given to me? and why do they keep trying after I've told them I've had it? is it just because I didn't get it through them so they don't have it on record like they usually would?