I am just working on a Hunter's Star using her ruler & have had no problems with it. When it comes to squaring up, are you sure you are putting the ruler on the block matching the correct spots on the ruler? You put the diagonal line on your diagonal line but also with the 6" point (if you are making a 6" block) on the one point of the trapezoid. You match those points + matching the diagonal line & it should match up. This is difficult to explain without showing a picture but if you watch her video it is a very good video. Hopefully this will help. I love the Hunter's Star & I am told you can do it without the ruler but I really find the ruler a good method.