Hi,

List items starting with a single word followed by a dot are removed because they are mistakenly being seen as part of the list.
Best to describe it with an example.

From Word:

• foo. bar
• foo bar. baz

Result in TinyMCE:

• bar
• foo bar. baz

I traced it back to WordFilter.js on (currently) line 184:
trimListStart(paragraphNode, /^\s*([\u2022\u00b7\u00a7\u25CF]|\w+\.)/);

The \w+\. part of the Regex is the cause of this removal.
I can only assume that this is needed for ordered lists starting with alpha characters (a. b. c.)

It is reproducible with the following Word document containing a small and simple list:
simplelist.docx

On pasting this content to tinymce, the "foo." part of the first list gets removed.
https://www.tinymce.com/docs/demo/basic-example/

Tested it with Word 2008 and 2011 (mac)
Latest TinyMCE (version 4.3.8)

Let me know if you need more info.