Cluster flight sim question in open rocket

I'm building a clone of the Semroc Ranger using a Big Bertha as a starting point. I created the rocket in open rocket but I'm having an issue with doing the flight simulations. I created an inner tube, marked it as a motor tube then set the cluster to 3.

The tube sizes are all correct and it looks good, shows three motor tubes. When I go to run the simulation it puts only 1 motor in the center of the cluster.

Does anyone know of a way around this or by chance have a sim file for the Ranger?

You can download the Rocksim file for this kit on the old Semroc website:
https://www.semroc.com/Store/scripts/RocketKits.asp?SKU=KV-83
PS: If you post your .ork file here then an OpenRocket guru like Neil or K'Tesh can look at it and advise you on what may be wrong.

Thanks for pointing me to the SIM File. By looking at that I figured out what I was doing wrong.