Using Word 2013

I have a Word document with a Table of Contents inside of it -

I have a 2nd document formatted similarly, but not identical to the first -

In a perfect world, I'd like to be able to copy / paste the T.O.C. out of the one document - into the other - update the table & have the new T.O.C. show as desired.

After I copy & pate - then update the Table of Contents in the 2nd document - I only show two section headings - but I have several that will not show -

Any help I could receive in getting the the other headings to show up in my T.O.C. that would be great.

This is keeeling me!