Looks perfect, works terribly...
Things to consider:
Chances are, the different treatments of the space are due to whether the space was included in the bolding of the word in MS Word.
Additionally, since Word files contain much underlying binary code (macros and such), your security settings might or might not be playing well with the Word stuff.
Are you importing the Word file from a network location, or from your local machine? Network traffic might be partially impacting the import, too.
Bottom line? You'll probably need to clear all formatting in the Word file and redo the formatting properly. To test this, cut a couple of pages into a new Word file, clear and redo the formatting in Word, import the Word file into another RH project, and see what results you get.
To clear the formatting:
Select text.
On the Home tab, in the Font group, click Clear Formatting.
Redo the formatting, being careful to not format the spaces.
Good luck,
Leon