Beefsteak tomatoes growing question

Question

We have purchased beefsteak tomatoe plants 3 years from 3 different nurseries in a row only to find as they get to be adult plants they are actually growing grape tomatoes. They are planted nex to cherry tomatoes plants. Is it possible that they cross pollinate and become grape tomatoes or are our nurseries mis-labeling???

Answer 1

Tomato varieties will produce fruit consistent with the varieties planted. Again, any crossing in the current season affects the seeds within the fruit, not the fruit flavor or structure.
Plants can often be miss labeled in greenhouse situations.