Sorting by files or titles

now everything is OK after iding the solution to

I removed some useless tags and made my 'exportings'
the minor problem is that the sorting is not exactly on what i expected . Sorting is made by directory then by file name
what i have to change so sorting ca be made by title or filename?
thanks once again !

To sort by TITLE, click on the column header of the column that shows the title data.
Repeated clicks go through ascending, descending, not sorted.
The same applies to the column with the filename.