I am having trouble understanding which table definitions are the ascendant ones: the CSSfile table definitions or the definitions from the Table option on the menu bar. Is there a conflict if I am applying the CSS style to every topic? Who wins...CSS or Table?
Sorry, but I think you are a bit confused. I'm assuming here that you are referring to defining tables via the toolbar? Where you use this button?
That simply inserts the table structure which is later styled using CSS.
Then there is the other option where you click Table > Insert > Table and you do two things. You insert the table structure as well as some special CSS codes that are added to your CSS file.