Ouch, that first one is definitely a bug. As for duration, that's definitely something that's missing and we can fix it by showing a proper timeline. You can already click on someone's profile to listen only to their answers, but we could make that easier to find and do as well.
Short, dense podcasts aren't unusual. Scientific American's "60 Second Science" is a good example. "NPR News Now" is just a few minutes long and updated hourly.