Lindyline, such beautiful blocks. Brarbbus your quilt is going to be beautiful.
Lightening don't worry about it, if it's short just add a border, nobody will ever know that that wasn't the way you intended it. If it really bothers you try adjusting your seam allowance, your probably inadvertently taking a little too large seam. Take two 2" strips and sew them together with what you think is a 1/4" seam, gently iron them open and measure your finished strip, it should measure 1 1/2". If it doesn't adjust your seam allowance to make it an exact 1 1/2" finished piece. I use my needle position button. I have to adjust my position to 6.1, my friend has to set hers at 5.9. It varies with every machine. I don't like th 1/4 inch foot.