Thank you all for your help and replies! I watched the video KLO gave the link for and I realized my mistake. The pattern said to press to the center square and so I did (very obedient learner quilter!) and when I got to the final seam, that was the problem as I had sewn down the ironed seam. I unpicked it and resewed, and darn if it wasn't "easy" as advertised!
Here is the pattern from the designer's blog photo:
http://duringquiettime.com/2013/11/s...available.html
I love the colours she used but I am doing it in blue Stonehenge fabrics.
Thanks again!
(until my next little mini-crisis! lol)
Nancy