This is a follow-up to my question about creating date filters which "click" to months (link to that thread at foot of this post) for a datasource which has a single row per month, all dated 1 Jan 2016, 1 Feb 2016, 1 Mar 2016... 1 Aug 2016 etc.
Thanks to David Li I've managed to work around using date parameters.
My follow-up question though is... what happens next month when I update my datasource with entries for 1 Sep 2016? My parameters were created using "Allowable Value = List" then "Add from Field > Date". If I have this right the list entry for 1 Sep 2016 will NOT be added automatically.