API - executionsequence is missing steps
One answer
I don't think you're doing anything wrong. It just seems like the steps where left out of the executionsequence schema and the code that processes the API request. I'm not sure if that was intentional. If no one else responds with a better answer, then file a defect against RQM:
http://jazz.net/jazz02/web/projects/Rational%20Quality%20Manager#action=com.ibm.team.workitem.newWorkItem
http://jazz.net/jazz02/web/projects/Rational%20Quality%20Manager#action=com.ibm.team.workitem.newWorkItem