Track changes and clone formatting not working

I have libreoffice 4.4. Having a problem with writer. When I click on the apprpriate button neither track changes not clone formatting do anything, although they have worked sometimes in the past. What is the solution? Also what is the difference between track and record changes?

Trying to use Clone Formatting to “copy” tabs from between paragraphs, no work. It will “copy” character formatting. CTR key held down during selection. Need help.