numbered document being renumbered

I am using Version: 5.1.6.2
Build ID: 07ac168c60a517dba0f0d7bc7540f5afa45f0909
CPU Threads: 4; OS Version: Windows 6.1; UI Render: default;
Locale: en-US (en_US); Calc: CL

I have a document that looks like this:
20. PARCEL DIVISIONS

20.1. Deciding Body: Administrator.

20.2. Applicability: Except where exempt at Section 20.3 below, a development permit authorizing parcel division must be obtained prior to the partition of any parcel within the jurisdiction of Boundary County.

20.3. Exemptions: Provisions of this section do not apply when all new parcels created are not platted and equal or exceed 20 acres or one-thirty-second aliquot portion of a section in size, nor will these provisions or minimum parcel size requirements apply when:

     20.3.1. Parcels are created for lease solely for the purpose of agricultural or silvicultural production and harvest.

When I save it as a doc, it looks like this, but when I save it as .html it looks like this:
20. PARCEL DIVISIONS

  1. Deciding Body: Administrator.

  2. Applicability: Except where exempt at Section 20.3 below, a development permit authorizing parcel division must be obtained prior to the partition of any parcel within the jurisdiction of Boundary County.

  3. Exemptions: Provisions of this section do not apply when all new parcels created are not platted and equal or exceed 20 acres or one-thirty-second aliquot portion of a section in size, nor will these provisions or minimum parcel size requirements apply when:

    3.1. Parcels are created for lease solely for the purpose of agricultural or silvicultural production and harvest.

This example is in Section 20 of my documents. I have the same issue with Sections 2, 7, 8, 10, 13, and 18 - all other Sections retain their appropriate Section numbers (as shown in the .doc example above). Specifically, I do NOT WANT TO LOSE THE SECTION NUMBERS but it appears that some form of auto-renumbering is in play. I have turned off numbering and re-saved, I’ve tried creating the document as a text file but when I save it as a .doc then .html I lose the Section numbers - but ONLY on a SELECT FEW of these Sections. Obviously there is a switch turned on somewhere but where? Thanks for putting up with this question - I will appreciate any help I can get!

Try File - Export - Export to XHTML. That seems to give better results than saving as HTML. You may also have more success if you save as odt and then save that as HTML instead of importing from .doc, which can give nasty compatibility issues.