That sounds like those missing socks we all have to deal with.
You know when we hade 3 children at home, we once had 2 laundry baskets full of these lost socks.
I hope you are not losing leads that way.
I have one, but the other?
I also have seen, many times, people go to a show, get so many leads and are so excited, yet what happens to most of the leads? They get lost.
In today's world with so much automation, the worst case should be that they get put into the wrong campaign and have to be correct. But lost? Never!