Hyperlinks not working correctly when converting word doc to Web Page, Filtered

I have created a word document (MS Word 2013) with Table of Contents and their links to particular sections and all the hyperlinks works fine in the word document. But when I convert this document into Web Page, Filtered then after a specific point the hyperlinks not pointing to their respective sections instead they are pointed to the end of the page.

I have checked the page source of the HTML document and found that the table of contents have hyper links but the respective sections doesn't have the hyper link code and hence click on the a section didn't find the that section and go to the end of the document.

Please advise me how to resolve this issue.