There’s no particular reason to think souls and reincarnation would follow the normal flow of time. If you can be reincarnated in a different place from where you lived, why not a different time? Maybe you could be reincarnated as anyone who had ever lived, or anyone ever will live. Taken to the extreme, there could be just one soul and we’re all reincarnations of each other. It’s all woo, so why not?