Izy, I love your word - you're right, the 4 corners are squiffy! I actually wanted them to be like the lower right, and could have lived with them if they had been all the same no matter which direction they went. The mitered borders are already on; I may just chalk this one up as an everyday throw.
reneebobby, I think when we were looking at it we did the same thing; focused on the red to make sure the star pattern came out. There was an initial problem with the center (1st layout looked like a swastika) and we focused on fixing that. Poor corners were obviously left to fend for themselves!