Dear Randy,
Thank you for your support.
Yes I already tried to place "title" as storage value of one of my field. It works for the first time I save the form. After that, if I want to modify the field linked to title, it concatenate previous value with the new one and if I reopen the article, both fields (title and my custom field) get concatenated value.
After reading your post I tired again and remove the main joomla title field from the construction panel. Here it works and the title value is updated properly.
In the meantime, I found a workaround :
I use the original title field but I only changed the "label" and its works. This modification is only linked to each individual form. So I can have multiple forms, with different labels for the main field.
It appears to be a good, simple and free solution. What's your point of view ? Will I encounter some issues with that method ?
Best Regards,
Lionel