I am making changes to a document and tracking changes.  My document includes
an outlined number system 1. (a), (i), 2., etc.  When I highlight paragraph
8. and hit the delete key, it lines out the entire paragraph.  It did not
change 9. automatically to 8.

If I accept changes to the document, it still does not change the numbering
sequence.  

Looking at the documents, I see no manual returns which would throw off the
numbering system.  All formatting looks correct.