Hello Brisket,
First I would like to verify what product and version you are running. I am assuming you are running InRoads V08.11.09.493 with the Open Roads Technology.
You should be able to create Key Stations by going to the Corridor Modeling > W > and selecting the key.
This command will ask you to select the Corridor you would like to add the key station to and then you can specify the station.
If you are not seeing the results you want after adding in Key Stations, please let me know. We can further troubleshoot with your dataset.