Hi Arnold, Just to add a bit more detail:
If you want Calibre to only create Collections on your Sony based on Series info then the place to set the configuration is in Preferences - Plugins - Device Interface - Sony - Customize plugin
. On this page is a box whose label begins 'Comma separated list of metadata...'. Make sure that box contains just one item, series
, (I think the default is series, tags
In addition, if you would like to add Series and Series_index to the front of each book Title as displayed in the Sony booklist e.g.
Wheel of Time 01 - The Eye of the World or perhaps
WoT 01 - The Eye of the World
then you can set up a Metadata Plugboard. This also has the added benefit that you can view the whole Sony booklist by Author, Series/Index, Title.
This may be a little daunting if you are new to all this, but if it sounds like something you'd like to have then I can tell you exactly what needs to go in each box on the Metadata Plugboard preferences page. Just reply here if you would like the details.