You don't say which version of the Organizer you're using (version 8 is notoriously troublesome) but, if you've turned off the Auto-Analyzer under Edit/Preferences, it's off. (Also, if you're capturing video in Premiere Elements, you may also want to ensure that it's turned off on the Capture screen.)
The good news is that the Auto Analyzer has done no permanent damage to your video. Each one of those clips is merely a trimmed version of your video. So you should be able to just open any of those clips in your Premiere Elements project and un-trim it in the Preview window to reclaim your longer clip.
Should have mentioned that I'm using V9.
I get that there's no actual data loss at the clip level, but I'm hoping to make extensive use of the catalog and would prefer that it be clean from the get go. It still seems odd to me that a feature could make unreviewed changes to your catalog with no way to back them out cleanly. Yikes.
As I've said, you can "untrim" any of the scenes and you will get back your original, full-length clip. That's pretty "clean", isn't it?
Thanks, Steve. It is clean in the sense that there is no data loss and that when editing in Premier I can take the extra step of untrimming such clips. Even if working in Premier, I still think it would be much cleaner if one could simply undo all of this from the Organizer and not have to worry about it when creating a new project. My main issue is that I'm really trying to use the Organizer itself as a bit of a friendly front-end to enable my family to peruse a decades-long video library, and all these meangingless scene groups would have really confused my novice users.
I'm good now. Had not gotten too far in tagging so I set the defaults to not run Auto-Analyzer and started over. Was considerably faster this go-around because I used DVMP Pro to change the modified date of each clip to reflect the timecode value for the first frame -- so this time everything but the really old analog 8 mm stuff came in with clean, detailed dates.
Thanks again for your help, Steve.
Glad things are back on track, Whit.