Thanks for the feedback, I'll look into the 'unfinished' bug right away. That shouldn't be happening. (It should stop showing unfinished if you get to 95% listened, which you can force by using the right most arrow while the media is playing).
The download more than 2 episodes thing will only work for new episodes it sees. Behind the scenes, when it's downloading podcasts it marks as many as that setting is set to for 'Auto download', the rest are set to 'No auto download'. Right now, editing the setting doesn't alter which current podcasts are set to auto and which aren't, though I'll probably change that as it makes more sense to do so. But, at any time and for any podcast if you get all the way into it's details and hit the menu there's a "Restart download" option that will force the download of any episode (also useful if a download is corrupted for some reason). Though, now that I say that and try it, it seems you need to hit it twice for them to start downloading right away (I'll fix that today).
Episodes should auto-delete once they reach the "Max unfinished to keep" threshold that can be set in the "Edit podcast" screen for each podcast. (It defaults to 4). So when it downloads a new episode, after the download is complete it looks at the older episodes. If it sees any that have been listened, it deletes those first to try to get under 4 total (or whatever it's set to). If it runs out of listened ones it'll start deleting the oldest unlistened ones to get under the limit. Let me know if this functionality isn't working for you or you were meaning something else...
I'll add the podcast url without http prefix to my todo list, thanks for the suggestion!
Browsing feeds is on my todo list, but I haven't found a source of data that would be worth using. If you have a site or source of podcasts I could look at let me know, but it's definitely on my todo list once major functionality is done.
Again, thanks for all the suggestions, they'll definitely help me make Podtrapper better for everyone. Keep it coming if you have any more ideas
Also, let me know if my responses didn't answer any of your questions (sometimes I misinterpret).