jsPDF html to pdf export margins are not aligned

I am using a script to export html to pdf but at the bottom, the page split is no corect. the script below

var HTML_Width = $("#content").width();
            var HTML_Height = $("#content").height();
            var top_left_margin = 15;
            var PDF_Width = HTML_Width + (top_left_margin * 2);
            var PDF_Height = (PDF_Width * 1.2) + (top_left_margin * 2);
            var canvas_image_width = HTML_Width;
            var canvas_image_height = HTML_Height;

            var totalPDFPages = Math.ceil(HTML_Height / PDF_Height) - 1;


            html2canvas($("#content")[0], { allowTaint: true }).then(function (canvas) {
                canvas.getContext('2d');

                console.log(canvas.height + "  " + canvas.width);


                var imgData = canvas.toDataURL("image/jpeg", 1.0);
                var pdf = new jsPDF('p', 'pt', [PDF_Width, PDF_Height]);
                var options = {pagesplit: true};
                pdf.addImage(imgData, 'JPG', top_left_margin, top_left_margin, canvas_image_width, canvas_image_height);


                for (var i = 1; i <= totalPDFPages; i++) {
                    pdf.addPage(PDF_Width, PDF_Height);
                    pdf.addImage(imgData, 'JPG', top_left_margin, -(PDF_Height * i) + (top_left_margin * 4), canvas_image_width, canvas_image_height);
                }

                pdf.save("JSA"+"-"+"@Model.JSAMain.JSANo"+".pdf");

            });

and a capture from pdf