It was actually a problem in the directions IMHO. I have made several of Judy Niemeyer's patterns before and never had a problem. I have made four curved quilts and never had a problem.
I came to a point in the directions where it said to trim the piece BEFORE you put everything together....at the time, I thought to myself, "Self, this isnt the way I would do this but she must have a reason!" Nope! Maybe a better quilter than I could have made the thing come out square but I dont think so easily because I took it to my LQS to ask them what to do and they said "What a shame!Why would you trim it before you sewed all those curves, you knew you were working with a bias."
The good news is that I have all of the parts that are wrong and I think I can make a set of coordinating pillow sham with them.