I just want to add something. I have many levels of headings and many
levels of subheadings. For example:

1 Heading one
1.1 Heading two
1.2 Heading two
1.2.1 Heading three.

This works fine. Its when I get to the paragraphs that come underneath
the headings that I experience the problem.See original question. I
hope somebody can help me.