The quilts are all beautiful. I have a problem . I wanted to add more blocks to the center that we started in QAYG. My blocks were 9" square. So, I had smaller blocks and I have carefully measured each block to be 9" squares. I have done everything step by step as I first did. They have been quilted and the sashing has been added. Now when I try to align the sashings, the center blocks are smaller and the sashings do not match. What can I do? HELP, PLEASE!!!!!