I have attached a part that I created in sheetmetal.  I did an unfold and created my holes with an array and did an extrude cut.  Then I did a fold.  The problem I am running into is when I do a flatten part the hole display is not the same as when I do a unfold.  The holes appear to look like they are punched out on a curve when I do a flatten part but are just fine when I do an unfold.  What am I missing in order to have the flatten part look like my unfold display?