Hi Scott,
Thank you for your interest in Essential PDF. Please use the following code to make the section following the HTMLToDLS convertion to follow in the same page
section.BreakCode = Syncfusion.DLS.SectionBreakCode.NoBreak;
Here is a sample for your referece:
HTMLToDLS.zip
Please take a look and let me know if you need any further assistance.
Thanks,
Ajish.