hi stoic
MyPodcasts View is the one to operate - refresh all button left top - though it is slow and tries to lure you into/impose on you automatics you may not want it works even though the info as to what you have and have not in the right bar doesn't synch in any way what my Finder says but fortunately there is the storage in Time Capsule ;-)
I haven't been to List View in more than a week and I won't dare to go there before an update promising to deal with it shows up.
For the record: second Thursday after initial 11.3 offering has passed - no update! (Thursday is update day in Germany)
Whatever Apple tells its Japanese help desk our problems are not figuring high on their to-do-list and isn't it remarkable that none of the oh so keen to bash Apple journalist crowd is interested in publishing it? To my mind that is the greatest stink of it all and suggests to me that journalists are happy to get walked by Apple on a very tight leash while parading themselves before the likes of me like independent know-all geeks they perform like Apple's own PR-minions.