Well when I go to view tab and do that, everything collapses even one another summary tab collapses too because of this one top summary tab. I didn't wanted all summary tabs to collapse rather I want it like this that when I collapse one summary tab, it doesn't have any effect on other summary tabs and its sub tasks.

but in my case when I collapse the top summary task, it collapses all below summary tasks, somehow the below summary task is acting like subtask while i wanted it to be an independant summary task.

Even the second summary task shares its days with the first summary task, while according to the structure that I wanted I didin't wanted the second summary task's days to be shared with the first summary task's days.