I'm having a similar issue with the Remote app. I have created playlists of podcasts in iTunes but they won't play via Remote. Remote will display the playlists but won't play them. Plus for some reason the order of podcasts within the playlist is changed versus what it is in iTunes. As far as I can tell there is only one version of the Remote app, not separate iPhone and iPad versions. I guess it is possible that the app behaves differently depending on which device it is running on.