I'm not 100% percent sure I understand your question, but i'll answer what I believe you are asking.
Are you referring to the 'Last Played' column on itunes not showing that you listened to it? I've had the same problem with music, but realized that you have to listen to the entire song for it to register as a 'Last Played' song/podcast. So if there is a 1 minute part at the end of the song/podcast where it's just (for example) static, you have to listen to the whole thing without pressing next to advance to the next song (I think you can fast forward the song close to the end without going to far so that it jumps to the next song as well).
So, if this is what you were asking, I hoped this helped. So just remember listen to the ENTIRE song/podcast without pressing next to advance to the next song and it should register as being played.
Matt