Look good to me. I am not quite sure what the problem was but I have trouble too with squares being not really SQUARE!
Part of my problem is that my seams are not always EXACTLY 1/4 inch! But another explanation might be the fact that fabric cut the width of the fabric stretches more than fabric cut along the edge (selvege). I really think this contributes to blocks varying in accurate measurements. It simply CANNOT be only my fault!!! Happy Quilting.