First and foremost, check and make sure you are not using any of the "Heading" styles for your body text. If you are, that may be your problem. If not, check what style you are using for the body text and once you know what style it is (1) go to the Reference ribbon and click on the "Table of Contents" drop-down menu; (2) Select "Options"; and (3) look for the style you are using and make sure there are NO "TOC Level" numbered.

Having said all of that, probably the easiest solution is to change your body text style for all you text to something more useful to your document (i.e., Body Text) and modify the parameters specific to your needs.

Hope this helps.