The example I posted was a new file I created for the occasion. The so-called heading styles that you could see appeared as a result of clicking on Style number in the Style ribbon. In a document like that I click on "Heading 2" then:
a) that style is not placed on the item
b) there is an instant production of "Heading,2" from within the system. "Heading 2" is unreachable.

c) if I open that file up on another computer I can see the defective heading styles in the drop down menu, but I can overide them from Styles in the the Word ribbon of the other computer.



It is not that a style called "Heading" (which does not exist anyway) is being altered to "Heading,2". It is the existing style "Heading 2" which is being altered by the insertion of a comma. There is some error in the Style file which is introducing the error. It certainly is not being introduced by me.