When you start the UI Engine in server mode (via run.bat) and the Smalltalk sample in client mode (by starting one of the exe files) then you will see two connections in the monitor. This is because the ULC ST Server Monitor is also packaged with the ICX. You can avoid this by creating a shortcut (or batch file) that calls the exe file with the parameter -appName X where X is the name of the application.
For example
Dossier.exe -appName
Dossier would start the dossier sample in client mode without also starting the ULC ST Server Monitor and therefore you will only see one connection in the Monitor.