I love your quilt and the colors. I would NEVER have noticed if I wasn't looking for something. And I had to search even then. I would have assumed they were supposed to be that way. The hint about photos really works. I took a picture of a bargello once, before sewing the strips, and sent it to my mother to show her what I was doing. She spotted it in a second. So..take a picture AND send it to somebody.
It's a beautiful quilt.