I have experienced an odd behaviour of the plug-in (web page modality). After some training, I get the correct (highlighted) number of elements for each field from a scientific book web site, but in the field Authors (and in this only) I get for each book the whole set of Authors, each subset separated by an ampersand character. I suspect it is brought about by the field itself and not from wrong XPath settings.
In other words, I get in the Authors field:
1. <authors of book1> & <authors of book2> & <authors of book3>
2. <authors of book1> & <authors of book2> & <authors of book3>
3. <authors of book1> & <authors of book2> & <authors of book3>
Where I am wrong then?
Thanks for attention