So sorry that you're having trouble. So frustrating!
I think there's something wrong far more than the 1/4" thing. I'd stop cutting right now, and get it figured out before proceeding any further.
If you look at the corners of the blue and green strips, you can see that the corner point is no where near the center of the strip. The point of those long strips should point directly into the corner they're going into, with the same amount of fabric on either side of the point.
Right now, you can see that on some of the strips, one side has far less fabric than the other side. You're off more than a few threads. It looks like you're off by at least 1/4". Something's wrong, but I can't tell what. Below is an example of what it should look like.
Now that I'm looking at your photo more....it appears that your horizontal blue & green pieces are wider than your slanty blue & green pieces. If so, they're
never going to fit together they way you need them to.
(Also, your blue horizontal pieces are not the same width as the green horizontal pieces.)
This could be a result of them not being cut the same width, or not being sewn with the same seam allowance, or both.
I would lay out all of your strips on top of each other to be sure that they're all the same width, and length. And that they're the length and width they need to be (versus "supposed to be" according to the pattern..I'm suspecting an error in the pattern).
Good luck! I hope this gets sorted out soon! Nothing more painful than a quilt that isn't working!!
