Export query to csv with parent & children data

I know how to export to a csv file and to add the parent & child data. I noticed a problem with one of the stories, the story in question has about 5 children but only one showed up in the report. All the children reported who the parent was with no trouble. I'm curious if there is a bug where it only lists out one child instead of all of them?

I created a simple 'unresolved' query and exported the data from the eclipse client.

Thanks!