Perhaps I'm trying to force Pandora-like behavior, and this can be achieved differently, but I'm looking for a way to mix radio stations in iTunes Radio. In Pandora, you can choose 'mix' and then choose the radio stations you want to mix. In iTunes radio, I can't find a way to do that. What I can seem to do is add more artists to a certain station, which isn't what I want to do. For example, I have Pearl Jam radio and want to mix it with Radiohead radio. Pandora will keep the stations separate so I can play either Pearl Jam or Radiohead, but iTunes radio makes me add Radiohead to the Pearl Jam station, which I don't want to do because at some point I will want to just listen to PJ. Any tips?