I have found that everyones l/4" isn't the same which can cause the unevenness. It is a beautiful quilt and even in the
picture you can't really tell the mismatch. After it is quilted
you won't even see it. A Big Hug to you for taking on this
challenge. Are you going to machine quilt it or hand quilt it.
Either way, it does hide a lot, and unless you have a magnifying glass no one will know. Just enjoy your progress.