The ‘doughnut’ view of media storage use and the DLNA server media counts are not related, as far as I know.
My understanding is that the ‘doughnut’ stats are created by the WD indexing service, and the DLNA media counts are created by the Twonky media server.
I don’t think the MyCloud Dashboard talks to the Twonky server to get media storage figures. Maybe someone from WD who is intimately involved in the Dashboard software could clarify the situation.
As Jeorg says, you need to make sure that media serving is enabled on shares containing media.
This FAQ may help set up your media server:
