I created two business projects by importing a CSV of all issues.
On the first one I ended up with the list view as per below, where all tasks are collapsed under the EPICs and no TASKs under them

On the second project, I ended up with all the TASKs collapsed, but also listed UNDER the EPIC list as per below

I must have done something to get the behavior of the first project, but I can't figure out what it was.
My users like to use the collapsed version. Any suggestions?