[enuddleyarbl]

I agree with both comments, above. But, for giggles, here's how I format my chapter headings in the stylesheet:

h1, h2, h3, h4 {
/* Basic Chapter Heading Styling */
  page-break-before: always;
  page-break-after: avoid;
  text-align: center;
}

I don't think I've ever gone beyond h4, so that's why I've only modified those four.