I have configured a Plan based on a board filter. I am seeing everything based on hierarchy of Initiative/Portfolio Epic/Epic/Story - which is exactly as I am expecting.
I want to be able to plan in the timeline view by SPRINT and not simply start/due date.
My observations: If I change the story to a particular sprint and refresh the timeline, it reflects properly. If I move the item in the timeline and save changes, it alters the start/due which I see in the story details.
When I change the sprint on that story, the timeline goes by start/due date again until I clear them from the story.