How do you change what is displayed as the current serries on the podcasting page?  I tried adding a new series and posting a sermon inside the series with a newer date than the one currently at the top but it persists.  Seems like there should be some way in the series list that the change is dictated.  Looking at the Lava it points to that list but it doesn't seem to be taking it form the dates of the series or the sermons.