I'm having the same behavior any news on this?
I'm still seeing this as well. When the schedule runs for multiple days we see multiple instances of this schedule still connected as a client. In my case they are not reaching the time limit, but are finishing and still not disconnecting. It's not clear if this is an issue with the admin console reporting incorrectly or if the users are actually still connected.
What version of FileMaker Server are you using? What operating system is this on?
Does this occur with any file or schedule in particular?
What exactly is the schedule doing?