I know there is a really low probability but this can happen, am I right ?
Just like the serial numbers on a call card, it is impossible to get corresponding numbers. Private Keys are safe until revealed to another party.
You don't get access to all the private keys of the Bitcoin addresses on a centralized exchange. These exchanges alone have access to your private keys. The possibility of your address been previously used is there but I don't think it's happening.
What is your point?