I generally find there are reasons for UFOs, sometimes it is outside circumstances but quite often there are workmanship or other errors.
In the Feathered Star, the maker did pretty good work! Not excellent but good and a nice hidden repair. I think however, they learned some things about paper piecing and tape that I was able to learn on less costly materials. That and apparently taking off paper was not their favorite part. What I can say about taking off paper is that my house and deck now look like a snowstorm happened.
The instructions/worksheet is there and it is clear by hand pencil she put in an additional subtle color and wanted the center star to alternate dark/light. Unfortunately she made the wrong decision in dealing with mirror images nasty tricksters they can be. I can just see the poor thing with her sections all made and running to lay it out to see the wonderful outcome of her hard work! And then the desperate scrabbling and rearranging and realizing that after all that time, effort, expense, there was a goof and she wasn't going to end up with what she wanted. And there was still a ton of paper to take off! Grumble grumble. And so the project was sent to sit in the corner in time out.
It could have been fixed fairly easily by I think just taking out and repositioning two of the centers. I decided that I or whoever could live with the "mistake" of alternating matched sets. Should have a picture tomorrow if I go back into the sewing room now.