The table of contents is picking up exactly what you have told it to!

Chances are good that it is based on heading styles.
Go to the text that is showing up in your TOC and Ctrl+Click on the text that should not be there to go to it in the document. See what style is applied. It should not be one that you have set to show up in your TOC. It may look like body text but likely has a heading style applied. Try pressing Ctrl+Shift+N. Then update your TOC (entire table).