It happens automatically, and I now think iTunes is the culprit. (Before I was assuming the the PodPress plug-in for WordPress was doing it.)
I ftp the normal files to the webserver, but when iTunes downloads them it changes the tags on your local copy to match the details in the post made in WordPress.
In theory though, you could do a batch download of
http://www.escapearchive.com/media/audio/ (using wget, WinHTTrack, Teleport Pro, or another such tool) and just overwrite the files in your iTunes folder. You might then have to highlight all in iTunes, right-click, Get Info, and then Cancel for iTunes to realize that the files have changed.
I can understand the OCD frustration, since that's exactly what motivated me to make an archive feed - it made me crazy to think of having manually-imported old episodes outside of the podcast section in iTunes.
