Multiple sshd processes left running but only logged in once?

Hi, Does anyone know why I would have multiple sshd processes running, some from up to a few days ago even though I am only logged in once? Additionally, if I run finger, it shows that I am logged in 4 times even though I am only currently only logged in once via an SSH connection. I suspect that these old sshd processes are left behind from some sort of an unclean logout but is this normal? If not, how can I get sshd to clean up? Thanks, Scott