Debra, I am sure more seeds will sprout. Someone has to be first! At first they don't climb but once they get going then they climb really well.
My yard long beans are a mess this year as I decided to grow them in back of some tomatoes. Well, they are invading the tomatoes instead of just going straight up. I haven't kept them picked that well but they still keep chugging out the beans. They have such pretty purple flowers.
Did you put one seed to a tomato cage? I would have put about ten seeds to a tomato cage but now that i think on it that is probably too much.