Don't worry. Apples and pears will often throw secondary flowers and they can sometimes set.
If they do then it would probably pay to remove them to save the trees strength as they will never make decent fruit.
In fact on some varieties the problem can be a darn nuisance. When varieties that don't normaly crop on one year wood go and produce fruit bud on that wood.
This is what causes bare wood problems on Cox for instance.No harm on mature trees but a real pest on young trees where the branch may be required as a stuctural part of the growing tree.
An apple a day.....keeps me in work.