makin, that's the same pattern I had. When you sew your strips together for the four patch, you have to square up the edges as you cut your small square sections.
Have you strip pieced before?

Right off the bat, I put my kit together wrong. I sewed a couple pieces of the larger border fabric together with the 4-patch fabric. I looked at it and realized my mistake. Maybe I'll write an encyclopedia of quilting mistakes.

FYI - most of the completed ones I've seen and the kits I've received used a stripe print as the border. It might be easier to figure out what's what if you kit has a striped fabric. :)

good luck.

Update: I disassembled the blocks I had sewn and measured each one. I can certainly understand the problem with any of the four-patch squares I had sewn but the larger blocks actually ranged in size from 5 3/4" to a little more than 6 1/4". I squared them to 6" and will add an additional narrow border to make up the size. Wish me luck!

Good luck now that you have re-cut the kit. I have made several for them with no problems. Ordered another one the other day.