Epicor Admin Console Maintainance- Unwanted sessions created for Process server

Hello experts,
Experiencing some serious issues with Admin console session management . Yesterday i have faced an issue ,i never seen and expected. There were almost 20-30 process server and Data administration. After deleting this sessions,it was recreated again in few seconds. Nobody was able to login. Finally i restarted the server.
Anybody help me about this scenario, why happend so ? how to take care to stop this.?

Thanks in Advance…