Whatever it is, I'm not sure, but that's kind of the issue. It doesn't seem to be explained what's going on anywhere, and I didn't realize I murdered multiple item appearances until I starting using their related skills and changing appearances (as someone who usually has at least a dozen outfits, for aesthetics and disguises, this has made things all the worse to just swap around for fun.)
So now I'm in this weird spot where I have to find the item appearances I used to have (which could be super expensive, I'm not sure yet), create new outfits just with those items equipped, just in order to revert them back to what I already had.
Then I have to remember never to do it again or end up back where I started.
I think -equip would very much be a more user friendly term for inventory juggle, alongside maybe separating the lists of outfits between outfits and gear templates when one types -listoutgit, because now it seems neither -appearance nor -loadoutfit seem to actually imply what they're doing to my inventory.
Example, and I'm sure this is a bug: I swap between gloves and an adamantine bracer time to time, but since my saved outfit was of a glove the system broke and replaced my bracer with some wacky red gauntlet thing that neither matched the gloves or the original bracer. It just... broke it into some gross red thing.