Instead of telling me about how the music is playing the same way as it has been in previous episodes (which I already know), why don't you suggest a solution? Podcasts typically don't have music playing while someone is speaking (EG. MuggleCast, Diggnation, TMZ), but obviously this podcast is an exception. Because I think that the music that the podcast plays now is distracting, I suggest to either remove the music and only play it at the beginning and end of the podcast, or to, like I said earlier, use lyric-less music.
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I made the decision to have music as something that breaks up discussion but carries on playing
You shouldn't depend on music to break up discussion. Look at the examples I posted, listen to their podcasts, and see how they move from one discussion to another without the use of music.