Why does Microsoft make simple tasks so hard?

I'm writing a spec for a new service. It's essentially a list of titles with subtitles. I'm stuck with a PC and Microsoft word to produce this all I need is to number the main headings and then letter the subheads. Using the numbering feature I managed nicely for a while but as the document got longer it started to screw up and get really annoying.

Please Microsoft build a programme that works, just once. Even Google blogger software lets me do this easier than Microsoft Word.