numbering lists formats change after saving

I am creating a document that when saved the formatting of the numbers and indents change .

  1. Sections
    1.1. This a subsection of the first section.
    1.2. This is the second.
    A. A point under the first
    B. a second point
    1.3. now a third subsection.
    A. Point
    B. point
    1. sub point
    2. to secure safety from fire, panic and other dangers; to promote and to protect the public health, safety, comfort, convenience, and general welfare; to provide adequate standards of light, air, and open space; to prevent the overcrowding of l
  2. it is at this point that when the document is saved and reopened at a later date, the formatting goes weird. This point will become 1.4 or even C even after utilizing up one level or the tab key. Also the indents go out to the edge, even after setting.

I had used 3. something or another to form a similar document, but it did not have so many sub points, this one could have up to 6 sub points.