Your first problem is using a paper pattern. If you nick it, it's reduced in size. I use template plastic and old scissors to cut. You can add seam allowances or not, depending on whether you are hand or rotary cutting. If hand, trace around the templates with a mechanical pencil with a #.05 lead. leave ½-inch between the pencil lines when cutting out. The pencil lines are your cutting lines. For rotary, include the seam allowances in the template. The easiest way to cut is to cut strips of fabric. For instance, if your template is 2½-inches square cut a strip 2½-inches and use the template to cut individual pieces, actually with this scenario, all you would have to do is cut each template using a ruler. However, hope you get the idea. Don't lay your fabric on a slippery table/counter as this will contribute to the fabric shifting.
SandyQuilter