[whpalmer4]

It looks like if you install Rob's Where in OF script that the following search will find all of the actions which have their own flags set and whose parents are not flagged:

tasks where (flagged is true) and (its parent task is not missing value) and (flagged of its parent task is not true)

Be warned, this will not identify tasks that you have explicitly flagged and then have also flagged the parent (or a parent of the parent).