On the client I was attempting to play directly from the store. Because my server is not accessible th eclient is the only real easy access. I had hoped to browse the store and playback a track on the server similar to what would happen in my media library. Now that you mention it, I didn't try to actually choose download an dthen play the track. I'll have to test that later. I'm not sure whether or not a download fom the client will even download the track on the server or not. I also wonder if it does download to the server library if it will even be available to the client or whether or not i would need to refresh the library.
That's also a good feature suggestion. Since the server is configured for auto-import, new media is added to the library at any time. That media is not available at the client unless the library is refreshed (restart MC or re-load the library.) It would be great if there was an auto refresh as there is an auto import.