Try again with firstline section header orphans.

dottes.tex

@@ -9,6 +9,7 @@
 \usepackage[defaultlines=4,all]{nowidow}
 \usepackage{tabularx}
 \usepackage{longtable}
+\usepackage{needspace}
 \usepackage[UKenglish]{babel}
 \usepackage[UKenglish]{isodate}
 

dottes.tex.section-firstlines

@@ -1,4 +1,6 @@
+\needspace{5\baselineskip}
 \section{@SECTIONNAME@ tunes}
+
 {\renewcommand{\arraystretch}{2.5}
 \setlength\LTleft{0pt}
 \setlength\LTright{\fill}