I started on my Folded Dahlia today and ran into a problem and I'm wondering if anyone else has had this problem.

The first row meets the second one perfectly. The second row starts to spread out too far. Meaning the last three six inch squares seem to be too small, the points do not meet up at all. By the fourth row I have an inch of background fabric betwen the two rows. I have ripped it out and resewed it several times with the same results. So,what am I doing wrong? Are my squares too small or what? Help!!