By pickups I mean re-recording bits where I made a mistake, usually without noticing, and none of my takes are good.

Ah, okay. Yeah, I dislike having to do that, too, but sometimes you have no choice. : (

The things with me is that I never use metadata myself when I listen or sort podfics, so I never added any for the longest time. But now I usually add my name, the title and the author's name in Audacity, because I know other people use it.