Yea, they are empty string before the derived column transformation

and NULL after the derived column transformation.

And the result is all columns quoted.

Screen shots are attached.

In the attached gifs you can see column EdiCarrier is one of the culprits. This columns has data in some rows, but not all. So I changed the query to only select rows where EdiCarrier = '' wondering if the column was NULL for every row, might it make a difference. There was no change in the behavior. I also deleted the flat file connection mgr and recreated it. I've seen it where it seems like a flat file connection definition gets "stuck" after making edits to it.