We have the following situation:
we would like to display e.g. data for the whole UnitedStates and for each State of the UnitedStates. If we select 'All Regions' on the selection panels we will need to display the world map and the whole UnitedStates. We would like then to select a filter 'United States' which will show the map of the US containing all the States and will show the States in the selection panel. Your example Multiple Map layers exchanges the map based on the year timeslider and the fact that you do not have data for every region in the same year. We have got data for the whole US AND every State in the same year and would like to show this on two different maps.
We need to see the different maps based on the filter selection panels,it would be nice if you could give us adivise on this issue?