Hi NEOJG,
In case of .Net or Java applications there can be more than one sessions connected when the application is used.
This is because they use Method Level protection. So number of sessions can change depending on the protected methods running within the application. Please confirm if this is a .Net application.
Share the screenshot of "Features" page to show the concurrency details set in the license.
Please contact us on our customer portal regarding delay in starting the service due to time taken in session getting killed.
Thanks,
Ashish