> To make things clearer, if I've validated 10 links 
> (out of 50, for example) and I observe 15 files 
> written, as every file written must come from a
> link, 
> either there are 5 files that dont have any origin,
> 
> or those files have been written but not validated 
> yet !?

Are you running a fresh project, or updating one?  I would probably expect
numbers like that if I was doing a project update.