Inserting an excel object creates problem in TOC

[Ian A King]

In my word 2013 document I have the an Excel object linked to an excel file and the TOC works OK, However, I need to add four more objects, now even after only inserting one object and then updating my TOC. The inserted object is appearing in my TOC and only the TOC headings after that table are shown. I need some help, why is this happening