One thing that threw me when I was listening to my Burbank feed was that sometimes I would stop/start the player (I was using Windows Media Player). Normally it picks back up with the real-time audio, but a few times it has started playing back the last segment that I had already listened to. When I started recognizing tail #'s and snippets of conversation, I realized what was going on.
Is it possible that that's why you seem to be hearing stuff that already happened?
Brian
Your KBUR feeder