Lucky Patsy's Mom beat me to it....if I try a new pattern, and no matter what I do, it doesn't "look right", I ditch the pattern. Or I adjust to MAKE it work! I've found a # of patterns on the internet for crocheting are wrong. I haven't found it often (or ever) with quilt patterns, but it's a thought. Good luck!

Personally, I would do it paper pieced, it's a very simple block to do that way.

Ive never done paper piecing. What is it

The pattern is done on paper, broken down into sections, and then the sections are broken down and numbered. It's very easy. If you go to quilterscache, she has a tutorial on it, and she also has a spool paper piece pattern, I think. If you Goggle paper piecing tutorial, you'll get a lot more information. If you still need a pattern, PM me and I'll get one to you.

where did you get that pattern? they don't all work. sometimes there's a printed mistake.

try drawing your 1/4" seam line on the Back of each piece.
place a pin through each place the lines intersect. at least one more pin along the seam. then sew.
an accurate 1/4" really makes a difference on this kind of piecing. hope this helps.

Could be that your "scant 1/4" isn't really scant, and you only notice it because there's 2 seams on the spool piece...

Or.... when you've used some thread from a spool, that's exactly how it looks!!! So these are used thread spools, not new ones....

The placement of the light corners on the brown is not correct. It's not a true HST which is what you want it to be. Take another square of the light and fold it over the brown matching the seam line to the red and you can see exactly where it needs to be seamed to the brown so it will match up to the red. I have a short cut for making spools, I'll post it later I got an appt. this morning.

Seems to me you are doing a large rectangle with two squares on the corners and sewing a line along the middle, trim and open. From the look of the right side, you are not doing the line right in the middle. It helps if you mark it first. The size of the square has to be the same measurement of the short side of the rectangle, on both sides.