If you are seeing the same triangles go by then yes cut a bit off and move it over. Depending on how close you are to being equal to the length you will just be using it in a different place. At the beginning you cut off a scrap. And the end there is a bit of scrap. Hopefully you don't run past that. That is one reason why you don't want to cut your repeat evenly as well. Like cutting a 24 in repeat in 2,4,6,8 in strips. If you are cutting more than one the second will fall where the first is.