Can't combine radio stations
I use Pandora, and have several genre and artist "stations" that play in shuffle mode, so I get to listen to lots of music I like, spanning across years and genres. I have contacted Apple today to find out if it's possible to create a station that combines several of theirs - such as "charting now", "pop hits" and "rock". Sadly, there isn't. So stop trying to, like I have been doing all day.