If you want your dynamic tasks to get sequentially executed you don't need a multiple instance node. What you can do is to create some kind of loop in your process. Something like:
- Configure task data (maybe a script task, subprocess or a Rule Task)
- Human Task
- X-OR Gateway checking if all the needed tasks were executed
- If 3 is true, then continue
- If 3 is false, go to 1
Best Regards,